2.2.1 release

.gitignore

@@ -0,0 +1,94 @@
+.metadata
+dependencies/
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+.project
+.externalToolBuilders/
+*.launch
+*.pydevproject
+*.jar
+.cproject
+.classpath
+.factorypath
+.buildpath
+.target
+.tern-project
+.texlipse
+.springBeans
+.recommenders/
+.cache-main
+.scala_dependencies
+.worksheet
+*.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+*.class
+*.log
+*.ctxt
+.mtj.tmp/
+*.war
+*.ear
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+*.rar
+hs_err_pid*
+*.iml
+.idea
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/gradle.xml
+.idea/**/mongoSettings.xml
+*.iws
+/out/
+.idea_modules/
+atlassian-ide-plugin.xml
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+!/.mvn/wrapper/maven-wrapper.jar
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+Desktop.ini
+$RECYCLE.BIN/
+*.cab
+*.msi
+*.msm
+*.msp
+*.lnk

ISSUE_TEMPLATE.md

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+## Issue
+Include here how the problem occured and how it's reproduceable.
+If present, also paste the entire error message from the console, preferably via a https://hastebin.com/ link.
+
+## Necessary server information
+**Running on**: <BungeeCord/Bukkit>
+
+**Maintenance version**: <>
+
+## Other information
+**Other motd changing plugins**: <>
+
+**ProtocolLib version**: <>

LICENSE.txt

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+GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

Maintenance-API/pom.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>maintenance-base</artifactId>
+        <groupId>eu.kennytv</groupId>
+        <version>2.2.1</version>
+    </parent>
+
+    <artifactId>maintenance-api</artifactId>
+    <name>Maintenance-API</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-api</artifactId>
+            <version>1.12-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.10.2-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

Maintenance-API/src/main/java/eu/kennytv/maintenance/api/IMaintenance.java

@@ -0,0 +1,36 @@
+package eu.kennytv.maintenance.api;
+
+public interface IMaintenance {
+
+    /**
+     * Enables/disables maintenance mode.
+     * If enabled, all non-permitted players will be kicked.
+     * <p>
+     * If using the BungeeCord version and MySQL is enabled,
+     * it will also be written into the database.
+     * </p>
+     *
+     * @param maintenance true to enable, false to disable maintenance mode
+     */
+    void setMaintenance(boolean maintenance);
+
+    /**
+     * @return true if maintenance is enabled on the proxy
+     */
+    boolean isMaintenance();
+
+    /**
+     * @return true if a timer task is currently running
+     */
+    boolean isTaskRunning();
+
+    /**
+     * @return version of the plugin
+     */
+    String getVersion();
+
+    /**
+     * @return {@link ISettings} for more options
+     */
+    ISettings getSettings();
+}

Maintenance-API/src/main/java/eu/kennytv/maintenance/api/ISettings.java

@@ -0,0 +1,56 @@
+package eu.kennytv.maintenance.api;
+
+import java.util.Map;
+import java.util.UUID;
+
+public interface ISettings {
+
+    /**
+     * @return true if maintenance is enabled on the proxy
+     */
+    boolean isMaintenance();
+
+    /**
+     * @return true if "join-notification" is set to true in the config
+     */
+    boolean isJoinNotifications();
+
+    /**
+     * @return true if "custom-maintenance-icon" is set to true in the config
+     */
+    boolean hasCustomIcon();
+
+    /**
+     * The keyset of the map contains the uuids as a string, the values the names of the players.
+     *
+     * @return map of uuids of whitelisted players with their last seen names
+     */
+    Map<UUID, String> getWhitelistedPlayers();
+
+    /**
+     * Removes a player from the maintenance whitelist.
+     *
+     * @param uuid uuid of the player to remove
+     * @return true if removing the player was successful
+     */
+    boolean removeWhitelistedPlayer(UUID uuid);
+
+    /**
+     * Removes a player from the maintenance whitelist.
+     *
+     * @param name name of the player to remove in lowercase letters
+     * @return true if removing the player was successful
+     * @deprecated if a player changes their name, the list will still contain their old one
+     */
+    @Deprecated
+    boolean removeWhitelistedPlayer(String name);
+
+    /**
+     * Adds a player to the maintenance whitelist.
+     *
+     * @param uuid uuid of the player to add
+     * @param name of the player to add
+     * @return true if adding the player was successful
+     */
+    boolean addWhitelistedPlayer(UUID uuid, String name);
+}

Maintenance-API/src/main/java/eu/kennytv/maintenance/api/MaintenanceBungeeAPI.java

@@ -0,0 +1,29 @@
+package eu.kennytv.maintenance.api;
+
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.plugin.Plugin;
+
+/**
+ * Utility class to get the {@link IMaintenance} instance for the BungeeCord version of the plugin.
+ * <p>
+ * This class is NOT available for the Spigot version!
+ * </p>
+ *
+ * @author KennyTV
+ * @since 1.0
+ */
+public final class MaintenanceBungeeAPI {
+
+    /**
+     * Returns API instance of IMaintenance.
+     *
+     * @return {@link IMaintenance} instance
+     */
+    public static IMaintenance getAPI() {
+        final Plugin maintenance = ProxyServer.getInstance().getPluginManager().getPlugin("MaintenanceBungee");
+        if (maintenance == null)
+            ProxyServer.getInstance().getLogger().warning("Could not get instance of MaintenanceBungee!");
+
+        return (IMaintenance) maintenance;
+    }
+}

Maintenance-API/src/main/java/eu/kennytv/maintenance/api/MaintenanceSpigotAPI.java

@@ -0,0 +1,29 @@
+package eu.kennytv.maintenance.api;
+
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+
+/**
+ * Utility class to get the {@link IMaintenance} instance for the Spigot/Bukkit version of the plugin.
+ * <p>
+ * This class is NOT available for the BungeeCord version!
+ * </p>
+ *
+ * @author KennyTV
+ * @since 1.0
+ */
+public final class MaintenanceSpigotAPI {
+
+    /**
+     * Returns API instance of IMaintenance.
+     *
+     * @return {@link IMaintenance} instance
+     */
+    public static IMaintenance getAPI() {
+        final Plugin maintenance = Bukkit.getPluginManager().getPlugin("MaintenanceSpigot");
+        if (maintenance == null)
+            Bukkit.getLogger().warning("Could not get instance of MaintenanceSpigot!");
+
+        return (IMaintenance) maintenance;
+    }
+}

Maintenance-Bungee/pom.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>eu.kennytv</groupId>
+        <artifactId>maintenance-base</artifactId>
+        <version>2.2.1</version>
+    </parent>
+
+    <artifactId>maintenance-bungee</artifactId>
+    <name>MaintenanceBungee</name>
+
+    <repositories>
+        <repository>
+            <id>bungeecord-repo</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-core</artifactId>
+            <version>${parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-api</artifactId>
+            <version>1.12-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.minecrell</groupId>
+            <artifactId>ServerListPlus</artifactId>
+            <version>3.4.8</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.zaxxer</groupId>
+            <artifactId>HikariCP</artifactId>
+            <version>3.1.0</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/MaintenanceBungeeBase.java

@@ -0,0 +1,21 @@
+package eu.kennytv.maintenance.bungee;
+
+import net.md_5.bungee.api.plugin.Plugin;
+
+import java.io.File;
+
+/**
+ * @author KennyTV
+ * @since 2.1
+ */
+public final class MaintenanceBungeeBase extends Plugin {
+
+    @Override
+    public void onEnable() {
+        new MaintenanceBungeePlugin(this);
+    }
+
+    File getPluginFile() {
+        return getFile();
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/MaintenanceBungeePlugin.java

@@ -0,0 +1,124 @@
+package eu.kennytv.maintenance.bungee;
+
+import eu.kennytv.maintenance.api.IMaintenance;
+import eu.kennytv.maintenance.api.ISettings;
+import eu.kennytv.maintenance.api.MaintenanceBungeeAPI;
+import eu.kennytv.maintenance.bungee.command.MaintenanceBungeeCommand;
+import eu.kennytv.maintenance.bungee.command.MaintenanceBungeeCommandBase;
+import eu.kennytv.maintenance.bungee.listener.PostLoginListener;
+import eu.kennytv.maintenance.bungee.listener.ProxyPingListener;
+import eu.kennytv.maintenance.bungee.metrics.MetricsLite;
+import eu.kennytv.maintenance.core.MaintenanceModePlugin;
+import eu.kennytv.maintenance.core.hook.ServerListPlusHook;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.plugin.Plugin;
+import net.md_5.bungee.api.plugin.PluginManager;
+import net.minecrell.serverlistplus.core.plugin.ServerListPlusPlugin;
+
+import java.io.File;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author KennyTV
+ * @since 1.0
+ */
+public final class MaintenanceBungeePlugin extends MaintenanceModePlugin {
+    private final MaintenanceBungeeBase plugin;
+    private final SettingsBungee settings;
+
+    MaintenanceBungeePlugin(final MaintenanceBungeeBase plugin) {
+        super("§8[§eMaintenanceBungee§8] ", plugin.getDescription().getVersion());
+
+        this.plugin = plugin;
+        plugin.getLogger().info("Plugin by KennyTV");
+
+        settings = new SettingsBungee(plugin);
+
+        final PluginManager pm = getProxy().getPluginManager();
+        pm.registerListener(plugin, new PostLoginListener(this, settings));
+        pm.registerListener(plugin, new ProxyPingListener(plugin, settings));
+        final MaintenanceBungeeCommand maintenanceCommand = new MaintenanceBungeeCommand(this, settings);
+        pm.registerCommand(plugin, new MaintenanceBungeeCommandBase(maintenanceCommand));
+
+        new MetricsLite(plugin);
+
+        // ServerListPlus integration
+        final Plugin serverListPlus = pm.getPlugin("ServerListPlus");
+        if (serverListPlus != null) {
+            serverListPlusHook = new ServerListPlusHook(((ServerListPlusPlugin) serverListPlus).getCore());
+            serverListPlusHook.setEnabled(!settings.isMaintenance());
+            plugin.getLogger().info("Enabled ServerListPlus integration!");
+        }
+    }
+
+    @Override
+    public void setMaintenance(final boolean maintenance) {
+        if (settings.getMySQL() != null) {
+            settings.setMaintenanceToSQL(maintenance);
+        } else {
+            settings.setMaintenance(maintenance);
+            settings.setToConfig("enable-maintenance-mode", maintenance);
+            settings.saveConfig();
+            settings.reloadConfigs();
+        }
+
+        if (serverListPlusHook != null)
+            serverListPlusHook.setEnabled(!maintenance);
+
+        if (isTaskRunning())
+            cancelTask();
+
+        if (maintenance) {
+            getProxy().getPlayers().stream()
+                    .filter(p -> !p.hasPermission("maintenance.bypass") && !settings.getWhitelistedPlayers().containsKey(p.getUniqueId()))
+                    .forEach(p -> p.disconnect(settings.getKickMessage().replace("%NEWLINE%", "\n")));
+            getProxy().broadcast(settings.getMaintenanceActivated());
+        } else
+            getProxy().broadcast(settings.getMaintenanceDeactivated());
+    }
+
+    @Override
+    public boolean isMaintenance() {
+        return settings.isMaintenance();
+    }
+
+    @Override
+    public int schedule(final Runnable runnable) {
+        return getProxy().getScheduler().schedule(plugin, runnable, 0, 1, TimeUnit.MINUTES).getId();
+    }
+
+    @Override
+    public void async(final Runnable runnable) {
+        getProxy().getScheduler().runAsync(plugin, runnable);
+    }
+
+    @Override
+    public void cancelTask() {
+        getProxy().getScheduler().cancel(taskId);
+        setTaskId(0);
+    }
+
+    @Override
+    public ISettings getSettings() {
+        return settings;
+    }
+
+    @Override
+    public File getPluginFile() {
+        return plugin.getPluginFile();
+    }
+
+    @Override
+    public void broadcast(final String message) {
+        getProxy().broadcast(message);
+    }
+
+    @Deprecated
+    public static IMaintenance getAPI() {
+        return MaintenanceBungeeAPI.getAPI();
+    }
+
+    public ProxyServer getProxy() {
+        return plugin.getProxy();
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/SettingsBungee.java

@@ -0,0 +1,179 @@
+package eu.kennytv.maintenance.bungee;
+
+import eu.kennytv.maintenance.bungee.mysql.MySQL;
+import eu.kennytv.maintenance.core.Settings;
+import net.md_5.bungee.api.ChatColor;
+import net.md_5.bungee.config.Configuration;
+import net.md_5.bungee.config.YamlConfiguration;
+
+import java.io.*;
+import java.nio.file.Files;
+import java.sql.SQLException;
+import java.util.List;
+import java.util.UUID;
+
+public final class SettingsBungee extends Settings {
+    private final String updateQuery;
+    private final String maintenanceQuery;
+    private final MySQL mySQL;
+
+    private final MaintenanceBungeeBase plugin;
+    private Configuration config;
+    private Configuration whitelist;
+
+    SettingsBungee(final MaintenanceBungeeBase plugin) {
+        this.plugin = plugin;
+        reloadConfigs(createFiles());
+
+        final Configuration mySQLSection = config.getSection("mysql");
+        if (mySQLSection.getBoolean("use-mysql", false)) {
+            plugin.getLogger().info("Trying to open database connection...");
+            mySQL = new MySQL(mySQLSection.getString("host"),
+                    mySQLSection.getInt("port"),
+                    mySQLSection.getString("username"),
+                    mySQLSection.getString("password"),
+                    mySQLSection.getString("database"));
+
+            // Varchar as the value regarding the possibility of saving stuff like the motd as well in future updates
+            final String mySQLTable = mySQLSection.getString("table");
+            mySQL.executeUpdate("CREATE TABLE IF NOT EXISTS " + mySQLTable + " (setting VARCHAR(16) PRIMARY KEY, value VARCHAR(255))");
+            updateQuery = "INSERT INTO " + mySQLTable + " (setting, value) VALUES (?, ?) ON DUPLICATE KEY UPDATE value = ?";
+            maintenanceQuery = "SELECT * FROM " + mySQLTable + " WHERE setting = ?";
+            plugin.getLogger().info("Done!");
+        } else {
+            mySQL = null;
+            updateQuery = null;
+            maintenanceQuery = null;
+        }
+    }
+
+    @Override
+    public void reloadConfigs() {
+        reloadConfigs(false);
+    }
+
+    @Override
+    public void saveConfig() {
+        final File file = new File(plugin.getDataFolder(), "bungee-config.yml");
+        try {
+            YamlConfiguration.getProvider(YamlConfiguration.class).save(config, new OutputStreamWriter(new FileOutputStream(file), "UTF8"));
+        } catch (final IOException e) {
+            throw new RuntimeException("Unable to save bungee-config.yml!", e);
+        }
+    }
+
+    @Override
+    public void saveWhitelistedPlayers() {
+        final File file = new File(plugin.getDataFolder(), "WhitelistedPlayers.yml");
+        try {
+            YamlConfiguration.getProvider(YamlConfiguration.class).save(whitelist, file);
+        } catch (final IOException e) {
+            throw new RuntimeException("Unable to save WhitelistedPlayers.yml!", e);
+        }
+    }
+
+    private void reloadConfigs(final boolean createdNewWhitelist) {
+        final File file = new File(plugin.getDataFolder(), "bungee-config.yml");
+        try {
+            config = YamlConfiguration.getProvider(YamlConfiguration.class).load(new InputStreamReader(new FileInputStream(file), "UTF8"));
+            whitelist = YamlConfiguration.getProvider(YamlConfiguration.class).load(new File(plugin.getDataFolder(), "WhitelistedPlayers.yml"));
+        } catch (final IOException e) {
+            throw new RuntimeException("Unable to load bungee-config.yml!", e);
+        }
+
+        if (createdNewWhitelist) {
+            whitelist.set("a8179ff3-c201-4a75-bdaa-9d14aca6f83f", "KennyTV");
+            saveWhitelistedPlayers();
+        }
+
+        loadSettings();
+    }
+
+    @Override
+    public void loadExtraSettings() {
+        whitelistedPlayers.clear();
+        whitelist.getKeys().forEach(key -> whitelistedPlayers.put(UUID.fromString(key), whitelist.getString(key)));
+    }
+
+    @Override
+    public void setWhitelist(final String uuid, final String s) {
+        whitelist.set(uuid, s);
+    }
+
+    @Override
+    public boolean createFiles() {
+        if (!plugin.getDataFolder().exists())
+            plugin.getDataFolder().mkdirs();
+
+        final File file = new File(plugin.getDataFolder(), "bungee-config.yml");
+        if (!file.exists()) {
+            try (final InputStream in = plugin.getResourceAsStream("bungee-config.yml")) {
+                Files.copy(in, file.toPath());
+            } catch (final IOException e) {
+                throw new RuntimeException("Unable to create bungee-config.yml file for MaintenanceBungee", e);
+            }
+        }
+
+        boolean createdNewWhitelist = false;
+        final File whitelistFile = new File(plugin.getDataFolder(), "WhitelistedPlayers.yml");
+        if (!whitelistFile.exists()) {
+            createdNewWhitelist = true;
+            try {
+                whitelistFile.createNewFile();
+            } catch (final IOException e) {
+                throw new RuntimeException("Unable to create WhitelistedPlayers.yml file for MaintenanceBungee", e);
+            }
+        }
+
+        return createdNewWhitelist;
+    }
+
+    @Override
+    public String getConfigString(final String path) {
+        return ChatColor.translateAlternateColorCodes('&', config.getString(path));
+    }
+
+    @Override
+    public boolean getConfigBoolean(final String path) {
+        return config.getBoolean(path);
+    }
+
+    @Override
+    public List<Integer> getBroadcastIntervallList() {
+        return config.getIntList("timer-broadcasts-for-minutes");
+    }
+
+    @Override
+    public void setToConfig(final String path, final Object var) {
+        config.set(path, var);
+    }
+
+    @Override
+    public boolean isMaintenance() {
+        if (mySQL != null) {
+            mySQL.executeQuery(maintenanceQuery, rs -> {
+                try {
+                    if (rs.next())
+                        maintenance = Boolean.parseBoolean(rs.getString("value"));
+                    rs.close();
+                } catch (final SQLException e) {
+                    e.printStackTrace();
+                }
+            }, "maintenance");
+        }
+
+        return maintenance;
+    }
+
+    public void setMaintenanceToSQL(final boolean maintenance) {
+        plugin.getProxy().getScheduler().runAsync(plugin, () -> {
+            final String s = String.valueOf(maintenance);
+            mySQL.executeUpdate(updateQuery, "maintenance", s, s);
+        });
+        this.maintenance = maintenance;
+    }
+
+    public MySQL getMySQL() {
+        return mySQL;
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/command/MaintenanceBungeeCommand.java

@@ -0,0 +1,72 @@
+package eu.kennytv.maintenance.bungee.command;
+
+import eu.kennytv.maintenance.bungee.MaintenanceBungeePlugin;
+import eu.kennytv.maintenance.bungee.SettingsBungee;
+import eu.kennytv.maintenance.bungee.util.ProxiedSenderInfo;
+import eu.kennytv.maintenance.core.command.MaintenanceCommand;
+import eu.kennytv.maintenance.core.util.SenderInfo;
+import net.md_5.bungee.api.ChatColor;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.ClickEvent;
+import net.md_5.bungee.api.chat.HoverEvent;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+
+public final class MaintenanceBungeeCommand extends MaintenanceCommand {
+
+    public MaintenanceBungeeCommand(final MaintenanceBungeePlugin plugin, final SettingsBungee settings) {
+        super(plugin, settings, "MaintenanceBungee");
+    }
+
+    @Override
+    protected void addPlayerToWhitelist(final SenderInfo sender, final String name) {
+        final ProxiedPlayer selected = ProxyServer.getInstance().getPlayer(name);
+        if (selected == null) {
+            sender.sendMessage(plugin.getPrefix() + "§cThere's no player online with that name.");
+            return;
+        }
+
+        if (settings.addWhitelistedPlayer(selected.getUniqueId(), selected.getName()))
+            sender.sendMessage(plugin.getPrefix() + "§aAdded §b" + selected.getName() + " §ato the maintenance whitelist!");
+        else
+            sender.sendMessage(plugin.getPrefix() + "§b" + selected.getName() + " §calready is in the maintenance whitelist!");
+    }
+
+    @Override
+    protected void removePlayerFromWhitelist(final SenderInfo sender, final String name) {
+        final ProxiedPlayer selected = ProxyServer.getInstance().getPlayer(name);
+        if (selected == null) {
+            if (settings.removeWhitelistedPlayer(name.toLowerCase()))
+                sender.sendMessage(plugin.getPrefix() + "§aRemoved §b" + name.toLowerCase() + " §afrom the maintenance whitelist!");
+            else
+                sender.sendMessage(plugin.getPrefix() + "§cThere is no player with that name in the maintenance whitelist!");
+            return;
+        }
+
+        if (settings.removeWhitelistedPlayer(selected.getUniqueId()))
+            sender.sendMessage(plugin.getPrefix() + "§aRemoved §b" + selected.getName() + " §afrom the maintenance whitelist!");
+        else
+            sender.sendMessage(plugin.getPrefix() + "§cThis player is not in the maintenance whitelist!");
+    }
+
+    @Override
+    protected void checkForUpdate(final SenderInfo sender) {
+        if (plugin.updateAvailable()) {
+            sender.sendMessage(plugin.getPrefix() + "§cNewest version available: §aVersion " + plugin.getNewestVersion() + "§c, you're still on §a" + plugin.getVersion());
+            sender.sendMessage(plugin.getPrefix() + "§c§lWARNING: §cYou will have to restart the proxy to prevent further issues and to complete the update!" +
+                    " If you can't do that, don't update!");
+            final TextComponent tc = new TextComponent("§6× §8[§aUpdate§8]");
+            tc.setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/maintenance forceupdate"));
+            tc.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, TextComponent.fromLegacyText("§aClick here to update the plugin")));
+            tc.addExtra(" §8< §7Or use the command §c/maintenace forceupdate");
+
+            ((ProxiedSenderInfo) sender).sendMessage(tc);
+        } else
+            sender.sendMessage(plugin.getPrefix() + "§aYou already have the latest version of the plugin!");
+    }
+
+    @Override
+    protected String getColoredString(final String message) {
+        return ChatColor.translateAlternateColorCodes('&', message);
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/command/MaintenanceBungeeCommandBase.java

@@ -0,0 +1,19 @@
+package eu.kennytv.maintenance.bungee.command;
+
+import eu.kennytv.maintenance.bungee.util.ProxiedSenderInfo;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.plugin.Command;
+
+public final class MaintenanceBungeeCommandBase extends Command {
+    private final MaintenanceBungeeCommand command;
+
+    public MaintenanceBungeeCommandBase(final MaintenanceBungeeCommand command) {
+        super("maintenance", "", "maintenancebungee");
+        this.command = command;
+    }
+
+    @Override
+    public void execute(final CommandSender sender, final String[] args) {
+        command.execute(new ProxiedSenderInfo(sender), args);
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/listener/PostLoginListener.java

@@ -0,0 +1,58 @@
+package eu.kennytv.maintenance.bungee.listener;
+
+import eu.kennytv.maintenance.bungee.MaintenanceBungeePlugin;
+import eu.kennytv.maintenance.bungee.SettingsBungee;
+import net.md_5.bungee.api.chat.ClickEvent;
+import net.md_5.bungee.api.chat.ComponentBuilder;
+import net.md_5.bungee.api.chat.HoverEvent;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.PostLoginEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.event.EventHandler;
+import net.md_5.bungee.event.EventPriority;
+
+public final class PostLoginListener implements Listener {
+    private final MaintenanceBungeePlugin plugin;
+    private final SettingsBungee settings;
+
+    public PostLoginListener(final MaintenanceBungeePlugin plugin, final SettingsBungee settings) {
+        this.plugin = plugin;
+        this.settings = settings;
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void postLogin(final PostLoginEvent event) {
+        final ProxiedPlayer p = event.getPlayer();
+        if (p.getUniqueId().toString().equals("a8179ff3-c201-4a75-bdaa-9d14aca6f83f"))
+            p.sendMessage("§6MaintenanceBungee §aVersion " + plugin.getVersion());
+        else if (settings.isMaintenance()) {
+            if (!p.hasPermission("maintenance.bypass") && !settings.getWhitelistedPlayers().containsKey(p.getUniqueId())) {
+                p.disconnect(settings.getKickMessage().replace("%NEWLINE%", "\n"));
+
+                if (settings.isJoinNotifications())
+                    plugin.getProxy().getPlayers().stream().filter(player -> player.hasPermission("maintenance.joinnotification"))
+                            .forEach(player -> player.sendMessage(settings.getJoinNotification().replace("%PLAYER%", p.getName())));
+                return;
+            }
+        }
+
+        if (!p.hasPermission("maintenance.admin")) return;
+
+        plugin.async(() -> {
+            if (plugin.updateAvailable()) {
+                p.sendMessage(plugin.getPrefix() + "§cThere is a newer version available: §aVersion " + plugin.getNewestVersion() + "§c, you're still on §a" + plugin.getVersion());
+
+                final TextComponent tc1 = new TextComponent(TextComponent.fromLegacyText(plugin.getPrefix() + " "));
+                final TextComponent tc2 = new TextComponent(TextComponent.fromLegacyText("§cDownload it at: §6https://www.spigotmc.org/resources/maintenancemode.40699/"));
+                final TextComponent click = new TextComponent(TextComponent.fromLegacyText(" §7§l§o(CLICK ME)"));
+                click.setClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, "https://www.spigotmc.org/resources/maintenancemode.40699/"));
+                click.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ComponentBuilder("§aDownload the latest version").create()));
+                tc1.addExtra(tc2);
+                tc1.addExtra(click);
+
+                p.sendMessage(tc1);
+            }
+        });
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/listener/ProxyPingListener.java

@@ -0,0 +1,51 @@
+package eu.kennytv.maintenance.bungee.listener;
+
+import eu.kennytv.maintenance.bungee.MaintenanceBungeeBase;
+import eu.kennytv.maintenance.bungee.SettingsBungee;
+import net.md_5.bungee.api.Favicon;
+import net.md_5.bungee.api.ServerPing;
+import net.md_5.bungee.api.event.ProxyPingEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.event.EventHandler;
+import net.md_5.bungee.event.EventPriority;
+
+import javax.imageio.ImageIO;
+import java.io.File;
+import java.io.IOException;
+
+public final class ProxyPingListener implements Listener {
+    private final MaintenanceBungeeBase plugin;
+    private final SettingsBungee settings;
+    private final File icon;
+    private Favicon favicon;
+
+    public ProxyPingListener(final MaintenanceBungeeBase plugin, final SettingsBungee settings) {
+        this.plugin = plugin;
+        this.settings = settings;
+        icon = new File("maintenance-icon.png");
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void proxyPing(final ProxyPingEvent event) {
+        if (!settings.isMaintenance()) return;
+
+        final ServerPing ping = event.getResponse();
+        ping.setVersion(new ServerPing.Protocol(settings.getPlayerCountMessage(), 1));
+        ping.setDescription(settings.getPingMessage().replace("%NEWLINE%", "\n"));
+        ping.setPlayers(new ServerPing.Players(0, 0, new ServerPing.PlayerInfo[]{
+                new ServerPing.PlayerInfo(settings.getPlayerCountHoverMessage().replace("%NEWLINE%", "\n"), "")
+        }));
+
+        if (settings.hasCustomIcon()) {
+            if (favicon != null)
+                ping.setFavicon(favicon);
+            else {
+                try {
+                    favicon = Favicon.create(ImageIO.read(icon));
+                } catch (final IOException | IllegalArgumentException e) {
+                    plugin.getLogger().warning("§4Could not load 'maintenance-icon.png' - did you create one in your Bungee folder (not the plugins folder)?");
+                }
+            }
+        }
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/metrics/MetricsLite.java

@@ -0,0 +1,274 @@
+package eu.kennytv.maintenance.bungee.metrics;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import net.md_5.bungee.api.plugin.Plugin;
+import net.md_5.bungee.api.scheduler.TaskScheduler;
+import net.md_5.bungee.config.Configuration;
+import net.md_5.bungee.config.ConfigurationProvider;
+import net.md_5.bungee.config.YamlConfiguration;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.*;
+import java.lang.reflect.InvocationTargetException;
+import java.net.URL;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+import java.util.zip.GZIPOutputStream;
+
+public final class MetricsLite {
+
+    static {
+        final String defaultPackage = new String(new byte[]{'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's'});
+        final String examplePackage = new String(new byte[]{'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
+        if (MetricsLite.class.getPackage().getName().equals(defaultPackage) || MetricsLite.class.getPackage().getName().equals(examplePackage)) {
+            throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
+        }
+    }
+
+    public static final int B_STATS_VERSION = 1;
+
+    private static final String URL = "https://bStats.org/submitData/bungeecord";
+
+    private final Plugin plugin;
+
+    private boolean enabled;
+
+    private String serverUUID;
+
+    private boolean logFailedRequests;
+
+    private static final List<Object> knownMetricsInstances = new ArrayList<>();
+
+    public MetricsLite(final Plugin plugin) {
+        this.plugin = plugin;
+
+        try {
+            loadConfig();
+        } catch (final IOException e) {
+            plugin.getLogger().log(Level.WARNING, "Failed to load bStats config!", e);
+            return;
+        }
+
+        if (!enabled) {
+            return;
+        }
+
+        final Class<?> usedMetricsClass = getFirstBStatsClass();
+        if (usedMetricsClass == null) {
+            return;
+        }
+        if (usedMetricsClass == getClass()) {
+            linkMetrics(this);
+            startSubmitting();
+        } else {
+            try {
+                usedMetricsClass.getMethod("linkMetrics", Object.class).invoke(null, this);
+            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+                if (logFailedRequests) {
+                    plugin.getLogger().log(Level.WARNING, "Failed to link to first metrics class " + usedMetricsClass.getName() + "!", e);
+                }
+            }
+        }
+    }
+
+    public static void linkMetrics(final Object metrics) {
+        knownMetricsInstances.add(metrics);
+    }
+
+    public JsonObject getPluginData() {
+        final JsonObject data = new JsonObject();
+
+        final String pluginName = plugin.getDescription().getName();
+        final String pluginVersion = plugin.getDescription().getVersion();
+
+        data.addProperty("pluginName", pluginName);
+        data.addProperty("pluginVersion", pluginVersion);
+
+        final JsonArray customCharts = new JsonArray();
+        data.add("customCharts", customCharts);
+
+        return data;
+    }
+
+    private void startSubmitting() {
+        final Timer timer = new Timer(true);
+        timer.scheduleAtFixedRate(new TimerTask() {
+            @Override
+            public void run() {
+                final TaskScheduler scheduler = plugin.getProxy().getScheduler();
+                scheduler.schedule(plugin, () -> submitData(), 0L, TimeUnit.SECONDS);
+            }
+        }, 1000 * 60 * 2, 1000 * 60 * 30);
+    }
+
+    private JsonObject getServerData() {
+        int playerAmount = plugin.getProxy().getOnlineCount();
+        playerAmount = playerAmount > 500 ? 500 : playerAmount;
+        final int onlineMode = plugin.getProxy().getConfig().isOnlineMode() ? 1 : 0;
+        final String bungeecordVersion = plugin.getProxy().getVersion();
+        final int managedServers = plugin.getProxy().getServers().size();
+
+        final String javaVersion = System.getProperty("java.version");
+        final String osName = System.getProperty("os.name");
+        final String osArch = System.getProperty("os.arch");
+        final String osVersion = System.getProperty("os.version");
+        final int coreCount = Runtime.getRuntime().availableProcessors();
+
+        final JsonObject data = new JsonObject();
+
+        data.addProperty("serverUUID", serverUUID);
+
+        data.addProperty("playerAmount", playerAmount);
+        data.addProperty("managedServers", managedServers);
+        data.addProperty("onlineMode", onlineMode);
+        data.addProperty("bungeecordVersion", bungeecordVersion);
+
+        data.addProperty("javaVersion", javaVersion);
+        data.addProperty("osName", osName);
+        data.addProperty("osArch", osArch);
+        data.addProperty("osVersion", osVersion);
+        data.addProperty("coreCount", coreCount);
+
+        return data;
+    }
+
+    private void submitData() {
+        final JsonObject data = getServerData();
+
+        final JsonArray pluginData = new JsonArray();
+        for (final Object metrics : knownMetricsInstances) {
+            try {
+                final Object plugin = metrics.getClass().getMethod("getPluginData").invoke(metrics);
+                if (plugin instanceof JsonObject) {
+                    pluginData.add((JsonObject) plugin);
+                }
+            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) {
+            }
+        }
+
+        data.add("plugins", pluginData);
+
+        new Thread(() -> {
+            try {
+                sendData(data);
+            } catch (Exception e) {
+                if (logFailedRequests) {
+                    plugin.getLogger().log(Level.WARNING, "Could not submit plugin stats!", e);
+                }
+            }
+        }).start();
+    }
+
+    private void loadConfig() throws IOException {
+        final Path configPath = plugin.getDataFolder().toPath().getParent().resolve("bStats");
+        configPath.toFile().mkdirs();
+        final File configFile = new File(configPath.toFile(), "config.yml");
+        if (!configFile.exists()) {
+            writeFile(configFile,
+                    "#bStats collects some data for plugin authors like how many servers are using their plugins.",
+                    "#To honor their work, you should not disable it.",
+                    "#This has nearly no effect on the server performance!",
+                    "#Check out https://bStats.org/ to learn more :)",
+                    "enabled: true",
+                    "serverUuid: \"" + UUID.randomUUID() + "\"",
+                    "logFailedRequests: false");
+        }
+
+        final Configuration configuration = ConfigurationProvider.getProvider(YamlConfiguration.class).load(configFile);
+
+        enabled = configuration.getBoolean("enabled", true);
+        serverUUID = configuration.getString("serverUuid");
+        logFailedRequests = configuration.getBoolean("logFailedRequests", false);
+    }
+
+    private Class<?> getFirstBStatsClass() {
+        final Path configPath = plugin.getDataFolder().toPath().getParent().resolve("bStats");
+        configPath.toFile().mkdirs();
+        final File tempFile = new File(configPath.toFile(), "temp.txt");
+
+        try {
+            final String className = readFile(tempFile);
+            if (className != null) {
+                try {
+                    return Class.forName(className);
+                } catch (final ClassNotFoundException ignored) {
+                }
+            }
+            writeFile(tempFile, getClass().getName());
+            return getClass();
+        } catch (final IOException e) {
+            if (logFailedRequests) {
+                plugin.getLogger().log(Level.WARNING, "Failed to get first bStats class!", e);
+            }
+            return null;
+        }
+    }
+
+    private String readFile(final File file) throws IOException {
+        if (!file.exists()) {
+            return null;
+        }
+        try (
+                FileReader fileReader = new FileReader(file);
+                BufferedReader bufferedReader = new BufferedReader(fileReader);
+        ) {
+            return bufferedReader.readLine();
+        }
+    }
+
+    private void writeFile(final File file, final String... lines) throws IOException {
+        if (!file.exists()) {
+            file.createNewFile();
+        }
+        try (
+                FileWriter fileWriter = new FileWriter(file);
+                BufferedWriter bufferedWriter = new BufferedWriter(fileWriter)
+        ) {
+            for (final String line : lines) {
+                bufferedWriter.write(line);
+                bufferedWriter.newLine();
+            }
+        }
+    }
+
+    private static void sendData(final JsonObject data) throws Exception {
+        if (data == null) {
+            throw new IllegalArgumentException("Data cannot be null");
+        }
+
+        final HttpsURLConnection connection = (HttpsURLConnection) new URL(URL).openConnection();
+
+        final byte[] compressedData = compress(data.toString());
+
+        connection.setRequestMethod("POST");
+        connection.addRequestProperty("Accept", "application/json");
+        connection.addRequestProperty("Connection", "close");
+        connection.addRequestProperty("Content-Encoding", "gzip");
+        connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
+        connection.setRequestProperty("Content-Type", "application/json");
+        connection.setRequestProperty("User-Agent", "MC-Server/" + B_STATS_VERSION);
+
+        connection.setDoOutput(true);
+        final DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
+        outputStream.write(compressedData);
+        outputStream.flush();
+        outputStream.close();
+
+        connection.getInputStream().close();
+    }
+
+    private static byte[] compress(final String str) throws IOException {
+        if (str == null) {
+            return null;
+        }
+        final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        final GZIPOutputStream gzip = new GZIPOutputStream(outputStream);
+        gzip.write(str.getBytes("UTF-8"));
+        gzip.close();
+        return outputStream.toByteArray();
+    }
+
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/mysql/MySQL.java

@@ -0,0 +1,73 @@
+package eu.kennytv.maintenance.bungee.mysql;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.function.Consumer;
+
+public final class MySQL {
+    private final HikariDataSource hikariDataSource;
+
+    // Excuse me and everything to do with the MySQL stuff, I have little to no idea of how to use databases
+    public MySQL(final String hostname, final int port, final String username, final String password, final String database) {
+        final HikariConfig hikariConfig = new HikariConfig();
+        hikariConfig.setMaximumPoolSize(10);
+        hikariConfig.addDataSourceProperty("serverName", hostname);
+        hikariConfig.addDataSourceProperty("user", username);
+        hikariConfig.addDataSourceProperty("password", password);
+        hikariConfig.addDataSourceProperty("url", "jdbc:mysql://" + hostname + ":" + port + "/" + database);
+        hikariConfig.setJdbcUrl("jdbc:mysql://" + hostname + ":" + port + "/" + database);
+        hikariConfig.setDataSourceClassName("com.mysql.jdbc.jdbc2.optional.MysqlDataSource");
+        hikariDataSource = new HikariDataSource(hikariConfig);
+    }
+
+    public void executeUpdate(final String query, final Consumer<Integer> callback, final Object... objects) {
+        try (final Connection connection = hikariDataSource.getConnection()) {
+            try (final PreparedStatement preparedStatement = connection.prepareStatement(query)) {
+                int current = 1;
+                for (final Object object : objects) {
+                    preparedStatement.setObject(current, object);
+                    current++;
+                }
+
+                callback.accept(preparedStatement.executeUpdate());
+            }
+        } catch (final SQLException e) {
+            System.out.println("Error while executing update method: " + query);
+            e.printStackTrace();
+        }
+    }
+
+    public void executeQuery(final String query, final Consumer<ResultSet> callback, final Object... objects) {
+        try (final Connection connection = hikariDataSource.getConnection()) {
+            try (final PreparedStatement preparedStatement = connection.prepareStatement(query)) {
+                int current = 1;
+                for (final Object object : objects) {
+                    preparedStatement.setObject(current, object);
+                    current++;
+                }
+
+                final ResultSet resultSet = preparedStatement.executeQuery();
+                callback.accept(resultSet);
+                resultSet.close();
+            }
+        } catch (final SQLException e) {
+            System.out.println("Error while executing query method: " + query);
+            e.printStackTrace();
+        }
+    }
+
+    public void executeUpdate(final String query, final Object... objects) {
+        executeUpdate(query, res -> {
+        }, objects);
+    }
+
+    public void close() {
+        if (hikariDataSource != null && !hikariDataSource.isClosed())
+            hikariDataSource.close();
+    }
+}

Maintenance-Bungee/src/main/java/eu/kennytv/maintenance/bungee/util/ProxiedSenderInfo.java

@@ -0,0 +1,40 @@
+package eu.kennytv.maintenance.bungee.util;
+
+import eu.kennytv.maintenance.core.util.SenderInfo;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+
+import java.util.UUID;
+
+public final class ProxiedSenderInfo extends SenderInfo {
+    private final CommandSender sender;
+
+    public ProxiedSenderInfo(final CommandSender sender) {
+        this.sender = sender;
+    }
+
+    @Override
+    public UUID getUuid() {
+        return sender instanceof ProxiedPlayer ? ((ProxiedPlayer) sender).getUniqueId() : null;
+    }
+
+    @Override
+    public String getName() {
+        return sender.getName();
+    }
+
+    @Override
+    public boolean hasPermission(final String permission) {
+        return sender.hasPermission(permission);
+    }
+
+    @Override
+    public void sendMessage(final String message) {
+        sender.sendMessage(message);
+    }
+
+    public void sendMessage(final TextComponent textComponent) {
+        sender.sendMessage(textComponent);
+    }
+}

Maintenance-Bungee/src/main/resources/bungee-config.yml

@@ -0,0 +1,50 @@
+# MaintenanceBungee Plugin by KennyTV 
+# Version ${project.version}
+
+# Enables maintenance-mode.
+enable-maintenance-mode: false
+
+# The message shown in the multiplayer server list motd.
+pingmessage: "&cMaintenance mode!%NEWLINE%&6We will be back soon!"
+
+# Is shown at the top right corner of the server in the serverlist,
+# where the playercount would normally be displayed.
+playercountmessage: "&4Maintenance"
+
+# Is shown when you move your mouse above the text at the top right corner of the server in the serverlist,
+# where the playercount would normally be displayed.
+playercounthovermessage: "&cCurrently under%NEWLINE%&cmaintenance"
+
+# Will be shown, when a player tries to join on the server without the permission.
+kickmessage: "&cThe server is currently under maintenance!%NEWLINE%Try again later!"
+
+# Some self explanatory messages
+no-permission: "&cYou do not have the permission to execute that command."
+maintenance-activated: "&6Maintenance mode is now activated."
+maintenance-deactivated: "&6Maintenance mode is now deactivated."
+
+starttimer-broadcast-mesage: '&8[&eMaintenance&8] &7Maintenance mode will be enabled in &6%MINUTES% minutes&7.'
+endtimer-broadcast-mesage: '&8[&eMaintenance&8] &7Maintenance mode will be disabled in &6%MINUTES% minutes&7.'
+
+# If using the timer command: In what intervalls before enabling/disabling maintenance there will be a broadcast.
+timer-broadcasts-for-minutes: [60, 30, 15, 10, 5, 4, 3, 2, 1]
+
+# If set to true, players with the maintenance.joinnotification permission will receive a message,
+# that a player tried to join the server while maintenance is enabled.
+send-join-notification: false
+join-notification: "&e%PLAYER% &ctried to join the server."
+
+# If set to true, the server icon will be changed to maintenance-icon.png in the Bungee main/base-folder.
+custom-maintenance-icon: false
+
+# Only enable MySQL if you really know what you are doing.
+# You need to have a table with the two following columns: 'setting' and 'value'.
+mysql:
+  use-mysql: false
+  host: host
+  port: 3306
+  database: database
+  username: username
+  password: password
+  # A new table with this name will be created on first startup when 'use-mysql' is set to true.
+  table: maintenance_settings

Maintenance-Bungee/src/main/resources/bungee.yml

@@ -0,0 +1,6 @@
+name: ${project.name}
+version: ${project.version}
+main: eu.kennytv.maintenance.bungee.MaintenanceBungeeBase
+author: KennyTV
+softDepends: [ServerListPlus]
+website: https://www.spigotmc.org/resources/maintenancemode.40699/

Maintenance-Core/pom.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>maintenance-base</artifactId>
+        <groupId>eu.kennytv</groupId>
+        <version>2.2.1</version>
+    </parent>
+
+    <artifactId>maintenance-core</artifactId>
+    <name>Maintenance-Core</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.12.2-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.minecrell</groupId>
+            <artifactId>ServerListPlus</artifactId>
+            <version>3.4.8</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-api</artifactId>
+            <version>${parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/MaintenanceModePlugin.java

@@ -0,0 +1,113 @@
+package eu.kennytv.maintenance.core;
+
+import eu.kennytv.maintenance.api.IMaintenance;
+import eu.kennytv.maintenance.core.hook.ServerListPlusHook;
+
+import java.io.*;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+
+public abstract class MaintenanceModePlugin implements IMaintenance {
+    protected final String version;
+    protected int taskId;
+    protected ServerListPlusHook serverListPlusHook;
+    private final String prefix;
+    private String newestVersion;
+
+    protected MaintenanceModePlugin(final String prefix, final String version) {
+        this.prefix = prefix;
+        this.version = version;
+    }
+
+    @Override
+    public String getVersion() {
+        return version;
+    }
+
+    @Override
+    public boolean isTaskRunning() {
+        return taskId != 0;
+    }
+
+    public void setTaskId(final int taskId) {
+        this.taskId = taskId;
+    }
+
+    public String getNewestVersion() {
+        return newestVersion;
+    }
+
+    public abstract int schedule(Runnable runnable);
+
+    public abstract void async(Runnable runnable);
+
+    public abstract void cancelTask();
+
+    public abstract File getPluginFile();
+
+    public abstract void broadcast(String message);
+
+    public String getPrefix() {
+        return prefix;
+    }
+
+    public boolean updateAvailable() {
+        try {
+            final HttpURLConnection c = (HttpURLConnection) new URL("https://api.spigotmc.org/legacy/update.php?resource=40699").openConnection();
+            final String newVersion = new BufferedReader(new InputStreamReader(c.getInputStream())).readLine().replaceAll("[a-zA-Z -]", "");
+
+            final boolean available = !newVersion.equals(version);
+            if (available)
+                newestVersion = newVersion;
+
+            return available;
+        } catch (final Exception ignored) {
+            return false;
+        }
+    }
+
+    public boolean installUpdate() {
+        try {
+            URL url = null;
+            try {
+                url = new URL("https://github.com/KennyTV/Maintenance/releases/download/" + newestVersion + "/Maintenance.jar");
+            } catch (final MalformedURLException e) {
+                e.printStackTrace();
+            }
+
+            final URLConnection conn = url.openConnection();
+            final InputStream is = new BufferedInputStream(conn.getInputStream());
+            final OutputStream os = new BufferedOutputStream(new FileOutputStream("plugins/Maintenance.tmp"));
+            final byte[] chunk = new byte[1024];
+            int chunkSize;
+            while ((chunkSize = is.read(chunk)) != -1) {
+                os.write(chunk, 0, chunkSize);
+            }
+            os.close();
+            final File newfile = new File("plugins/Maintenance.tmp");
+            final long newlength = newfile.length();
+            if (newlength <= 10000) {
+                newfile.delete();
+                return false;
+            } else {
+                final FileInputStream is2 = new FileInputStream(new File("plugins/Maintenance.tmp"));
+                final OutputStream os2 = new BufferedOutputStream(new FileOutputStream(getPluginFile()));
+                final byte[] chunk2 = new byte[1024];
+                int chunkSize2;
+                while ((chunkSize2 = is2.read(chunk2)) != -1)
+                    os2.write(chunk2, 0, chunkSize2);
+                is2.close();
+                os2.close();
+
+                final File tmp = new File("plugins/Maintenance.tmp");
+                tmp.delete();
+                return true;
+            }
+        } catch (final IOException e) {
+            e.printStackTrace();
+            return false;
+        }
+    }
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/Settings.java

@@ -0,0 +1,164 @@
+package eu.kennytv.maintenance.core;
+
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import eu.kennytv.maintenance.api.ISettings;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+
+public abstract class Settings implements ISettings {
+    protected final Map<UUID, String> whitelistedPlayers = Maps.newHashMap();
+    protected boolean maintenance;
+    private Set<Integer> broadcastIntervalls;
+    private String timerBroadcastMessage;
+    private String endtimerBroadcastMessage;
+    private String pingMessage;
+    private String kickMessage;
+    private String joinNotification;
+    private String noPermMessage;
+    private String maintenanceActivated;
+    private String maintenanceDeactivated;
+    private String playerCountMessage;
+    private String playerCountHoverMessage;
+    private boolean joinNotifications;
+    private boolean customMaintenanceIcon;
+
+    protected void loadSettings() {
+        timerBroadcastMessage = getConfigString("starttimer-broadcast-mesage");
+        endtimerBroadcastMessage = getConfigString("endtimer-broadcast-mesage");
+        pingMessage = getConfigString("pingmessage");
+        kickMessage = getConfigString("kickmessage");
+        joinNotification = getConfigString("join-notification");
+        noPermMessage = getConfigString("no-permission");
+        maintenanceActivated = getConfigString("maintenance-activated");
+        maintenanceDeactivated = getConfigString("maintenance-deactivated");
+        maintenance = getConfigBoolean("enable-maintenance-mode");
+        joinNotifications = getConfigBoolean("send-join-notification");
+        customMaintenanceIcon = getConfigBoolean("custom-maintenance-icon");
+        broadcastIntervalls = Sets.newHashSet(getBroadcastIntervallList());
+        playerCountMessage = getConfigString("playercountmessage");
+        playerCountHoverMessage = getConfigString("playercounthovermessage");
+
+        loadExtraSettings();
+    }
+
+    public abstract void saveWhitelistedPlayers();
+
+    public abstract boolean createFiles();
+
+    public abstract String getConfigString(String path);
+
+    public abstract boolean getConfigBoolean(String path);
+
+    public abstract List<Integer> getBroadcastIntervallList();
+
+    public abstract void loadExtraSettings();
+
+    public abstract void setWhitelist(String uuid, String s);
+
+    public abstract void saveConfig();
+
+    public abstract void reloadConfigs();
+
+    public abstract void setToConfig(String path, Object var);
+
+    public String getTimerBroadcastMessage() {
+        return timerBroadcastMessage;
+    }
+
+    public String getEndtimerBroadcastMessage() {
+        return endtimerBroadcastMessage;
+    }
+
+    public String getPingMessage() {
+        return pingMessage;
+    }
+
+    public String getKickMessage() {
+        return kickMessage;
+    }
+
+    public String getJoinNotification() {
+        return joinNotification;
+    }
+
+    public String getNoPermMessage() {
+        return noPermMessage;
+    }
+
+    public String getMaintenanceActivated() {
+        return maintenanceActivated;
+    }
+
+    public String getMaintenanceDeactivated() {
+        return maintenanceDeactivated;
+    }
+
+    public String getPlayerCountMessage() {
+        return playerCountMessage;
+    }
+
+    public String getPlayerCountHoverMessage() {
+        return playerCountHoverMessage;
+    }
+
+    public void setMaintenance(final boolean maintenance) {
+        this.maintenance = maintenance;
+    }
+
+    @Override
+    public boolean isMaintenance() {
+        return maintenance;
+    }
+
+    @Override
+    public boolean isJoinNotifications() {
+        return joinNotifications;
+    }
+
+    @Override
+    public boolean hasCustomIcon() {
+        return customMaintenanceIcon;
+    }
+
+    public Set<Integer> getBroadcastIntervalls() {
+        return broadcastIntervalls;
+    }
+
+    @Override
+    public Map<UUID, String> getWhitelistedPlayers() {
+        return whitelistedPlayers;
+    }
+
+    @Override
+    public boolean removeWhitelistedPlayer(final UUID uuid) {
+        if (!whitelistedPlayers.containsKey(uuid)) return false;
+        whitelistedPlayers.remove(uuid);
+        setWhitelist(uuid.toString(), null);
+        saveWhitelistedPlayers();
+        return true;
+    }
+
+    @Deprecated
+    @Override
+    public boolean removeWhitelistedPlayer(final String name) {
+        if (!whitelistedPlayers.containsValue(name)) return false;
+        final UUID uuid = whitelistedPlayers.entrySet().stream().filter(entry -> entry.getValue().equals(name)).findFirst().get().getKey();
+        whitelistedPlayers.remove(uuid);
+        setWhitelist(uuid.toString(), null);
+        saveWhitelistedPlayers();
+        return true;
+    }
+
+    @Override
+    public boolean addWhitelistedPlayer(final UUID uuid, final String name) {
+        final boolean contains = !whitelistedPlayers.containsKey(uuid);
+        whitelistedPlayers.put(uuid, name);
+        setWhitelist(uuid.toString(), name);
+        saveWhitelistedPlayers();
+        return contains;
+    }
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/command/MaintenanceCommand.java

@@ -0,0 +1,197 @@
+package eu.kennytv.maintenance.core.command;
+
+import eu.kennytv.maintenance.core.MaintenanceModePlugin;
+import eu.kennytv.maintenance.core.Settings;
+import eu.kennytv.maintenance.core.runnable.MaintenanceRunnable;
+import eu.kennytv.maintenance.core.util.MessageUtil;
+import eu.kennytv.maintenance.core.util.SenderInfo;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.UUID;
+
+public abstract class MaintenanceCommand {
+    protected final MaintenanceModePlugin plugin;
+    protected final Settings settings;
+    private final String name;
+
+    protected MaintenanceCommand(final MaintenanceModePlugin plugin, final Settings settings, final String name) {
+        this.plugin = plugin;
+        this.settings = settings;
+        this.name = name;
+    }
+
+    public void execute(final SenderInfo sender, final String[] args) {
+        if (!sender.hasPermission("maintenance.admin")) {
+            sender.sendMessage(settings.getNoPermMessage());
+            return;
+        }
+
+        if (args.length == 1) {
+            if (args[0].equalsIgnoreCase("on")) {
+                plugin.setMaintenance(true);
+            } else if (args[0].equalsIgnoreCase("off")) {
+                plugin.setMaintenance(false);
+            } else if (args[0].equalsIgnoreCase("reload")) {
+                if (!sender.hasPermission("maintenance.reload")) {
+                    sender.sendMessage(settings.getNoPermMessage());
+                    return;
+                }
+
+                settings.reloadConfigs();
+                sender.sendMessage(plugin.getPrefix() + "§aReloaded config.yml");
+            } else if (args[0].equalsIgnoreCase("update")) {
+                if (!sender.hasPermission("maintenance.admin")) {
+                    sender.sendMessage(settings.getNoPermMessage());
+                    return;
+                }
+
+                checkForUpdate(sender);
+            } else if (args[0].equals("forceupdate")) {
+                if (!sender.hasPermission("maintenance.admin")) {
+                    sender.sendMessage(settings.getNoPermMessage());
+                    return;
+                }
+
+                sender.sendMessage(plugin.getPrefix() + "§c§lDownloading update...");
+
+                if (plugin.installUpdate())
+                    sender.sendMessage(plugin.getPrefix() + "§a§lThe update was successful! To prevent issues with tasks and to complete the update, you have to restart the proxy!");
+                else
+                    sender.sendMessage(plugin.getPrefix() + "§4Failed!");
+            } else if (args[0].equalsIgnoreCase("whitelist")) {
+                final Map<UUID, String> players = settings.getWhitelistedPlayers();
+                if (players.isEmpty()) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThe maintenance whitelist is empty! Use \"/maintenance add <player>\" to add someone!");
+                } else if (players.size() == 1 && players.containsKey(UUID.fromString("a8179ff3-c201-4a75-bdaa-9d14aca6f83f"))) {
+                    sender.sendMessage(plugin.getPrefix() + "§cUse \"/maintenance add <player>\" to add someone. Alternatively, you can add the uuid of a player to the WhitelistedPlayers.yml as seen in the example in the file!");
+                } else {
+                    sender.sendMessage("§6Whitelisted players for maintenance:");
+                    players.forEach((key, value) -> sender.sendMessage("§8- §e" + value));
+                    sender.sendMessage("");
+                }
+            } else
+                sendUsage(sender);
+        } else if (args.length == 2) {
+            if (args[0].equalsIgnoreCase("endtimer")) {
+                if (!MessageUtil.isNumeric(args[1])) {
+                    sender.sendMessage(plugin.getPrefix() + "§6/maintenance timer endtimer <minutes>");
+                    return;
+                }
+                if (plugin.isTaskRunning()) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThere's already a starttimer scheduled!");
+                    return;
+                }
+
+                final int minutes = Integer.parseInt(args[1]);
+                if (minutes > 40320) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThe number has to be less than 40320 (28 days)!");
+                    return;
+                }
+                if (minutes < 1) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThink about running a timer for a negative amount of minutes. Doesn't work §othat §r§cwell.");
+                    return;
+                }
+
+                plugin.setMaintenance(true);
+                sender.sendMessage(plugin.getPrefix() + "§aStarted timer: §7Maintenance mode will be deactivated in §6" + minutes + " minutes§7.");
+                plugin.setTaskId(plugin.schedule(new MaintenanceRunnable(plugin, settings, minutes, false)));
+            } else if (args[0].equalsIgnoreCase("starttimer")) {
+                if (!MessageUtil.isNumeric(args[1])) {
+                    sender.sendMessage(plugin.getPrefix() + "§6/maintenance timer starttimer <minutes>");
+                    return;
+                }
+                if (plugin.isTaskRunning()) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThere's already running a timer!");
+                    return;
+                }
+
+                final int minutes = Integer.parseInt(args[1]);
+                if (minutes > 40320) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThe number has to be less than 40320 (28 days)!");
+                    return;
+                }
+                if (minutes < 1) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThink about running a timer for a negative amount of minutes. Doesn't work §othat §cwell.");
+                    return;
+                }
+
+                sender.sendMessage(plugin.getPrefix() + "§aStarted timer: §7Maintenance mode will be activated in §6" + minutes + " minutes§7.");
+                plugin.setTaskId(plugin.schedule(new MaintenanceRunnable(plugin, settings, minutes, true)));
+            } else if (args[0].equalsIgnoreCase("timer")) {
+                if (args[1].equalsIgnoreCase("abort") || args[1].equalsIgnoreCase("stop") || args[1].equalsIgnoreCase("cancel")) {
+                    if (!plugin.isTaskRunning()) {
+                        sender.sendMessage(plugin.getPrefix() + "§cThere's currently no running timer.");
+                        return;
+                    }
+
+                    plugin.cancelTask();
+                    sender.sendMessage(plugin.getPrefix() + "§cThe timer has been disabled.");
+                } else
+                    sendUsage(sender);
+            } else if (args[0].equalsIgnoreCase("add")) {
+                addPlayerToWhitelist(sender, args[1]);
+            } else if (args[0].equalsIgnoreCase("remove")) {
+                removePlayerFromWhitelist(sender, args[1]);
+            } else
+                sendUsage(sender);
+        } else if (args.length == 3) {
+            if (args[0].equalsIgnoreCase("setmotd")) {
+                if (!MessageUtil.isNumeric(args[1])) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThe first argument has to be numeric!");
+                    return;
+                }
+
+                final int line = Integer.parseInt(args[1]);
+                if (line < 1 || line > 2) {
+                    sender.sendMessage(plugin.getPrefix() + "§cThe first argument has to be a 1 or a 2!");
+                    return;
+                }
+
+                final String message = getColoredString(String.join(" ", Arrays.copyOfRange(args, 2, args.length)));
+                final String oldMessage = settings.getConfigString("pingmessage");
+                final String newMessage;
+                if (line == 1)
+                    newMessage = oldMessage.contains("%NEWLINE%") ?
+                            message + "%NEWLINE%" + oldMessage.split("%NEWLINE%", 2)[1] : message;
+                else
+                    newMessage = oldMessage.contains("%NEWLINE%") ?
+                            oldMessage.split("%NEWLINE%", 2)[0] + "%NEWLINE%" + message : oldMessage + "%NEWLINE%" + message;
+
+                settings.setToConfig("pingmessage", newMessage);
+                settings.saveConfig();
+                settings.reloadConfigs();
+                sender.sendMessage(plugin.getPrefix() + "§aSet line " + line + " of the maintenance motd to §f" + message);
+            } else
+                sendUsage(sender);
+        } else
+            sendUsage(sender);
+    }
+
+    private void sendUsage(final SenderInfo sender) {
+        sender.sendMessage("");
+        sender.sendMessage("§8===========[ §e" + name + " §8| §eVersion: §e" + plugin.getVersion() + " §8]===========");
+        sender.sendMessage("§6/maintenance reload §7(Reloads the config file)");
+        sender.sendMessage("§6/maintenance on §7(Enables maintenance mode");
+        sender.sendMessage("§6/maintenance off §7(Disables maintenance mode)");
+        sender.sendMessage("§6/maintenance setmotd <1/2> <message> §7(Sets the motd for maintenance mode)");
+        sender.sendMessage("§6/maintenance starttimer <minutes> §7(After the given time in minutes, maintenance mode will be enabled. Broadcast settings for the timer can be found in the config)");
+        sender.sendMessage("§6/maintenance endtimer <minutes> §7(Enables maintenance mode. After the given time in minutes, maintenance mode will be disabled)");
+        sender.sendMessage("§6/maintenance timer abort §7(If running, the current timer will be aborted)");
+        sender.sendMessage("§6/maintenance add <player> §7(Adds the player to the maintenance whitelist, so they can join the server even though maintenance is enabled)");
+        sender.sendMessage("§6/maintenance remove <player> §7(Removes the player from the maintenance whitelist)");
+        sender.sendMessage("§6/maintenance whitelist §7(Shows all whitelisted players for the maintenance mode)");
+        sender.sendMessage("§6/maintenance update §7(Remotely downloads the newest version of the plugin onto your server)");
+        sender.sendMessage("§9Created by: KennyTV");
+        sender.sendMessage("§8===========[ §e" + name + " §8| §eVersion: §e" + plugin.getVersion() + " §8]===========");
+        sender.sendMessage("");
+    }
+
+    protected abstract void addPlayerToWhitelist(SenderInfo sender, String name);
+
+    protected abstract void removePlayerFromWhitelist(SenderInfo sender, String name);
+
+    protected abstract void checkForUpdate(SenderInfo sender);
+
+    protected abstract String getColoredString(String message);
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/hook/ServerListPlusHook.java

@@ -0,0 +1,15 @@
+package eu.kennytv.maintenance.core.hook;
+
+import net.minecrell.serverlistplus.core.ServerListPlusCore;
+
+public final class ServerListPlusHook {
+    private final ServerListPlusCore serverListPlusCore;
+
+    public ServerListPlusHook(final ServerListPlusCore serverListPlusCore) {
+        this.serverListPlusCore = serverListPlusCore;
+    }
+
+    public void setEnabled(final boolean enable) {
+        serverListPlusCore.getProfiles().setEnabled(enable);
+    }
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/runnable/MaintenanceRunnable.java

@@ -0,0 +1,34 @@
+package eu.kennytv.maintenance.core.runnable;
+
+import eu.kennytv.maintenance.core.MaintenanceModePlugin;
+import eu.kennytv.maintenance.core.Settings;
+
+public final class MaintenanceRunnable implements Runnable {
+    private final MaintenanceModePlugin plugin;
+    private final Settings settings;
+    private final boolean enable;
+    private int minutes;
+
+    public MaintenanceRunnable(final MaintenanceModePlugin plugin, final Settings settings, final int minutes, final boolean enable) {
+        this.plugin = plugin;
+        this.settings = settings;
+        this.minutes = minutes;
+        this.enable = enable;
+    }
+
+    @Override
+    public void run() {
+        if (minutes <= 0) {
+            plugin.setMaintenance(enable);
+            if (plugin.isTaskRunning())
+                plugin.cancelTask();
+        } else if (settings.getBroadcastIntervalls().contains(minutes)) {
+            if (enable)
+                plugin.broadcast(settings.getTimerBroadcastMessage().replaceAll("%MINUTES%", String.valueOf(minutes)));
+            else
+                plugin.broadcast(settings.getEndtimerBroadcastMessage().replaceAll("%MINUTES%", String.valueOf(minutes)));
+        }
+
+        minutes--;
+    }
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/util/MessageUtil.java

@@ -0,0 +1,13 @@
+package eu.kennytv.maintenance.core.util;
+
+public final class MessageUtil {
+
+    public static boolean isNumeric(final String string) {
+        try {
+            Integer.parseInt(string);
+        } catch (final NumberFormatException nfe) {
+            return false;
+        }
+        return true;
+    }
+}

Maintenance-Core/src/main/java/eu/kennytv/maintenance/core/util/SenderInfo.java

@@ -0,0 +1,14 @@
+package eu.kennytv.maintenance.core.util;
+
+import java.util.UUID;
+
+public abstract class SenderInfo {
+
+    public abstract UUID getUuid();
+
+    public abstract String getName();
+
+    public abstract boolean hasPermission(String permission);
+
+    public abstract void sendMessage(String message);
+}

Maintenance-Parent/pom.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>maintenance-base</artifactId>
+        <groupId>eu.kennytv</groupId>
+        <version>2.2.1</version>
+    </parent>
+
+    <artifactId>maintenance-parent</artifactId>
+    <name>Maintenance</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-core</artifactId>
+            <version>${parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-bungee</artifactId>
+            <version>${parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-spigot</artifactId>
+            <version>${parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>

Maintenance-Parent/src/main/resources/LICENSE.txt

@@ -1,4 +1,4 @@
-                    GNU GENERAL PUBLIC LICENSE
+GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>

Maintenance-Parent/src/main/resources/WhitelistedPlayers.yml

@@ -0,0 +1 @@
+a8179ff3-c201-4a75-bdaa-9d14aca6f83f: KennyTV

Maintenance-Spigot/pom.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>eu.kennytv</groupId>
+        <artifactId>maintenance-base</artifactId>
+        <version>2.2.1</version>
+    </parent>
+
+    <artifactId>maintenance-spigot</artifactId>
+    <name>MaintenanceSpigot</name>
+
+    <repositories>
+        <repository>
+            <id>spigotmc-repo</id>
+            <url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
+        </repository>
+        <repository>
+            <id>dmulloy2-repo</id>
+            <url>http://repo.dmulloy2.net/nexus/repository/public/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>eu.kennytv</groupId>
+            <artifactId>maintenance-core</artifactId>
+            <version>${parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.12.2-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.minecrell</groupId>
+            <artifactId>ServerListPlus</artifactId>
+            <version>3.4.8</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.comphenix.protocol</groupId>
+            <artifactId>ProtocolLib-API</artifactId>
+            <version>4.3.0</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/MaintenanceSpigotBase.java

@@ -0,0 +1,21 @@
+package eu.kennytv.maintenance.spigot;
+
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.io.File;
+
+/**
+ * @author KennyTV
+ * @since 2.1
+ */
+public final class MaintenanceSpigotBase extends JavaPlugin {
+
+    @Override
+    public void onEnable() {
+        new MaintenanceSpigotPlugin(this);
+    }
+
+    File getPluginFile() {
+        return getFile();
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/MaintenanceSpigotPlugin.java

@@ -0,0 +1,130 @@
+package eu.kennytv.maintenance.spigot;
+
+import eu.kennytv.maintenance.api.IMaintenance;
+import eu.kennytv.maintenance.api.ISettings;
+import eu.kennytv.maintenance.api.MaintenanceSpigotAPI;
+import eu.kennytv.maintenance.core.MaintenanceModePlugin;
+import eu.kennytv.maintenance.core.hook.ServerListPlusHook;
+import eu.kennytv.maintenance.spigot.command.MaintenanceSpigotCommand;
+import eu.kennytv.maintenance.spigot.listener.PacketListener;
+import eu.kennytv.maintenance.spigot.listener.PlayerLoginListener;
+import eu.kennytv.maintenance.spigot.listener.ServerListPingListener;
+import eu.kennytv.maintenance.spigot.metrics.MetricsLite;
+import net.minecrell.serverlistplus.core.plugin.ServerListPlusPlugin;
+import org.bukkit.Server;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginManager;
+
+import java.io.File;
+
+/**
+ * @author KennyTV
+ * @since 1.0
+ */
+public final class MaintenanceSpigotPlugin extends MaintenanceModePlugin {
+    private final MaintenanceSpigotBase plugin;
+    private final SettingsSpigot settings;
+
+    // Added "/maintenance setmotd <1/2> <message>" command to edit the maintenance mode motd via a command
+    // The Bungee version of the plugin will now automatically create a MySQL table if it is enabled, so you won't have to manually create one anymore
+    // Fixed the ServerListPlus motd only changing on using the command, but not on the server startup
+    // Fixed an error with canceling the start-/endtimer in the Bungee version
+    // Fixed an error with removing players from the whitelist in the Spigot version
+    // Fixed some other minor bugs
+    // Some internal code cleanup
+
+    MaintenanceSpigotPlugin(final MaintenanceSpigotBase plugin) {
+        super("§8[§eMaintenanceSpigot§8] ", plugin.getDescription().getVersion());
+
+        this.plugin = plugin;
+        settings = new SettingsSpigot(plugin);
+
+        plugin.getLogger().info("Plugin by KennyTV");
+        plugin.getCommand("maintenancespigot").setExecutor(new MaintenanceSpigotCommand(this, settings));
+
+        final PluginManager pm = getServer().getPluginManager();
+        pm.registerEvents(new PlayerLoginListener(this, settings), plugin);
+
+        new MetricsLite(plugin);
+
+        if (pm.getPlugin("ProtocolLib") != null)
+            new PacketListener(this, plugin, settings);
+        else
+            pm.registerEvents(new ServerListPingListener(plugin, settings), plugin);
+
+        // ServerListPlus integration
+        final Plugin serverListPlus = pm.getPlugin("ServerListPlus");
+        if (serverListPlus != null) {
+            serverListPlusHook = new ServerListPlusHook(((ServerListPlusPlugin) serverListPlus).getCore());
+            serverListPlusHook.setEnabled(!settings.isMaintenance());
+            plugin.getLogger().info("Enabled ServerListPlus integration!");
+        }
+    }
+
+    @Override
+    public void setMaintenance(final boolean maintenance) {
+        settings.setMaintenance(maintenance);
+        settings.setToConfig("enable-maintenance-mode", maintenance);
+        settings.saveConfig();
+        settings.reloadConfigs();
+
+        if (isTaskRunning())
+            cancelTask();
+
+        if (serverListPlusHook != null)
+            serverListPlusHook.setEnabled(!maintenance);
+
+        if (maintenance) {
+            getServer().getOnlinePlayers().stream()
+                    .filter(p -> !p.hasPermission("maintenance.bypass") && !settings.getWhitelistedPlayers().containsKey(p.getUniqueId()))
+                    .forEach(p -> p.kickPlayer(settings.getKickMessage().replace("%NEWLINE%", "\n")));
+            getServer().broadcastMessage(settings.getMaintenanceActivated());
+        } else
+            getServer().broadcastMessage(settings.getMaintenanceDeactivated());
+    }
+
+    @Override
+    public boolean isMaintenance() {
+        return settings.isMaintenance();
+    }
+
+    @Override
+    public int schedule(final Runnable runnable) {
+        return getServer().getScheduler().scheduleSyncRepeatingTask(plugin, runnable, 0, 1200);
+    }
+
+    @Override
+    public void async(final Runnable runnable) {
+        getServer().getScheduler().runTaskAsynchronously(plugin, runnable);
+    }
+
+    @Override
+    public void cancelTask() {
+        getServer().getScheduler().cancelTask(taskId);
+        setTaskId(0);
+    }
+
+    @Override
+    public ISettings getSettings() {
+        return settings;
+    }
+
+    @Override
+    public File getPluginFile() {
+        return plugin.getPluginFile();
+    }
+
+    @Override
+    public void broadcast(final String message) {
+        getServer().broadcastMessage(message);
+    }
+
+    @Deprecated
+    public static IMaintenance getAPI() {
+        return MaintenanceSpigotAPI.getAPI();
+    }
+
+    public Server getServer() {
+        return plugin.getServer();
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/SettingsSpigot.java

@@ -0,0 +1,110 @@
+package eu.kennytv.maintenance.spigot;
+
+import eu.kennytv.maintenance.core.Settings;
+import org.bukkit.ChatColor;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import java.io.*;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.UUID;
+
+public final class SettingsSpigot extends Settings {
+    private final MaintenanceSpigotBase plugin;
+    private FileConfiguration config;
+    private FileConfiguration whitelist;
+
+    SettingsSpigot(final MaintenanceSpigotBase plugin) {
+        this.plugin = plugin;
+        createFiles();
+        reloadConfigs();
+    }
+
+    @Override
+    public void saveConfig() {
+        try {
+            config.save(new File(plugin.getDataFolder(), "spigot-config.yml"));
+        } catch (final IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void saveWhitelistedPlayers() {
+        try {
+            whitelist.save(new File(plugin.getDataFolder(), "WhitelistedPlayers.yml"));
+        } catch (final IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void reloadConfigs() {
+        final File file = new File(plugin.getDataFolder(), "spigot-config.yml");
+        try {
+            config = YamlConfiguration.loadConfiguration(new InputStreamReader(new FileInputStream(file), "UTF8"));
+            whitelist = YamlConfiguration.loadConfiguration(new File(plugin.getDataFolder(), "WhitelistedPlayers.yml"));
+        } catch (final IOException e) {
+            throw new RuntimeException("Unable to load spigot-config.yml!", e);
+        }
+
+        loadSettings();
+    }
+
+    @Override
+    public void loadExtraSettings() {
+        whitelistedPlayers.clear();
+        whitelist.getKeys(false).forEach(key -> whitelistedPlayers.put(UUID.fromString(key), whitelist.getString(key)));
+    }
+
+    @Override
+    public void setWhitelist(final String uuid, final String s) {
+        whitelist.set(uuid, s);
+    }
+
+    @Override
+    public boolean createFiles() {
+        if (!plugin.getDataFolder().exists())
+            plugin.getDataFolder().mkdirs();
+
+        final File file = new File(plugin.getDataFolder(), "spigot-config.yml");
+        if (!file.exists()) {
+            try (final InputStream in = plugin.getResource("spigot-config.yml")) {
+                Files.copy(in, file.toPath());
+            } catch (final IOException e) {
+                throw new RuntimeException("Unable to create spigot-config.yml file for Maintenance!", e);
+            }
+        }
+
+        final File whitelistFile = new File(plugin.getDataFolder(), "WhitelistedPlayers.yml");
+        if (!whitelistFile.exists()) {
+            try (final InputStream in = plugin.getResource("WhitelistedPlayers.yml")) {
+                Files.copy(in, whitelistFile.toPath());
+            } catch (final IOException e) {
+                throw new RuntimeException("Unable to create WhitelistedPlayers.yml file for Maintenance!", e);
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public String getConfigString(final String path) {
+        return ChatColor.translateAlternateColorCodes('&', config.getString(path));
+    }
+
+    @Override
+    public boolean getConfigBoolean(final String path) {
+        return config.getBoolean(path);
+    }
+
+    @Override
+    public List<Integer> getBroadcastIntervallList() {
+        return config.getIntegerList("timer-broadcasts-for-minutes");
+    }
+
+    @Override
+    public void setToConfig(final String path, final Object var) {
+        config.set(path, var);
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/command/MaintenanceSpigotCommand.java

@@ -0,0 +1,85 @@
+package eu.kennytv.maintenance.spigot.command;
+
+import eu.kennytv.maintenance.core.command.MaintenanceCommand;
+import eu.kennytv.maintenance.core.util.SenderInfo;
+import eu.kennytv.maintenance.spigot.MaintenanceSpigotPlugin;
+import eu.kennytv.maintenance.spigot.SettingsSpigot;
+import eu.kennytv.maintenance.spigot.util.BukkitSenderInfo;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public final class MaintenanceSpigotCommand extends MaintenanceCommand implements CommandExecutor {
+
+    public MaintenanceSpigotCommand(final MaintenanceSpigotPlugin plugin, final SettingsSpigot settings) {
+        super(plugin, settings, "MaintenanceSpigot");
+    }
+
+    @Override
+    public boolean onCommand(final CommandSender sender, final Command cmd, final String s, final String[] args) {
+        execute(new BukkitSenderInfo(sender), args);
+        return true;
+    }
+
+    @Override
+    protected void addPlayerToWhitelist(final SenderInfo sender, final String name) {
+        final Player selected = Bukkit.getPlayer(name);
+        if (selected != null) {
+            settings.addWhitelistedPlayer(selected.getUniqueId(), selected.getName());
+            sender.sendMessage(plugin.getPrefix() + "§aAdded §b" + selected.getName() + " §ato the maintenance whitelist!");
+            return;
+        }
+
+        final OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(name);
+        if (!offlinePlayer.hasPlayedBefore()) {
+            sender.sendMessage(plugin.getPrefix() + "§cNo player with this name has played on this server before.");
+            return;
+        }
+
+        if (settings.addWhitelistedPlayer(offlinePlayer.getUniqueId(), offlinePlayer.getName()))
+            sender.sendMessage(plugin.getPrefix() + "§aAdded §b" + offlinePlayer.getName() + " §ato the maintenance whitelist!");
+        else
+            sender.sendMessage(plugin.getPrefix() + "§b" + offlinePlayer.getName() + " §calready is in the maintenance whitelist!");
+    }
+
+    @Override
+    protected void removePlayerFromWhitelist(final SenderInfo sender, final String name) {
+        final Player selected = Bukkit.getPlayer(name);
+        if (selected != null) {
+            settings.removeWhitelistedPlayer(selected.getUniqueId());
+            sender.sendMessage(plugin.getPrefix() + "§aRemoved §b" + selected.getName() + " §afrom the maintenance whitelist!");
+            return;
+        }
+
+        final OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(name);
+        if (!offlinePlayer.hasPlayedBefore()) {
+            sender.sendMessage(plugin.getPrefix() + "§cNo player with this name has played on this server before.");
+            return;
+        }
+
+        if (settings.removeWhitelistedPlayer(offlinePlayer.getUniqueId()))
+            sender.sendMessage(plugin.getPrefix() + "§aRemoved §b" + offlinePlayer.getName() + " §afrom the maintenance whitelist!");
+        else
+            sender.sendMessage(plugin.getPrefix() + "§cThis player is not in the maintenance whitelist!");
+    }
+
+    @Override
+    protected void checkForUpdate(final SenderInfo sender) {
+        if (plugin.updateAvailable()) {
+            sender.sendMessage(plugin.getPrefix() + "§cNewest version available: §aVersion " + plugin.getNewestVersion() + "§c, you're still on §a" + plugin.getVersion());
+            sender.sendMessage(plugin.getPrefix() + "§c§lWARNING: §cYou will have to restart the server to prevent further issues and to complete the update!" +
+                    " If you can't do that, don't update!");
+            sender.sendMessage(plugin.getPrefix() + "§eUse §c§l/maintenance forceupdate §eto update!");
+        } else
+            sender.sendMessage(plugin.getPrefix() + "§aYou already have the latest version of the plugin!");
+    }
+
+    @Override
+    protected String getColoredString(final String message) {
+        return ChatColor.translateAlternateColorCodes('&', message);
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/listener/PacketListener.java

@@ -0,0 +1,55 @@
+package eu.kennytv.maintenance.spigot.listener;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.ListenerPriority;
+import com.comphenix.protocol.events.PacketAdapter;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.wrappers.WrappedGameProfile;
+import com.comphenix.protocol.wrappers.WrappedServerPing;
+import com.google.common.collect.Lists;
+import eu.kennytv.maintenance.spigot.MaintenanceSpigotBase;
+import eu.kennytv.maintenance.spigot.MaintenanceSpigotPlugin;
+import eu.kennytv.maintenance.spigot.SettingsSpigot;
+
+import javax.imageio.ImageIO;
+import java.io.File;
+import java.util.List;
+import java.util.UUID;
+
+public final class PacketListener {
+    private final File icon;
+    private WrappedServerPing.CompressedImage image;
+
+    public PacketListener(final MaintenanceSpigotPlugin pl, final MaintenanceSpigotBase base, final SettingsSpigot settings) {
+        icon = new File("maintenance-icon.png");
+        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(base, ListenerPriority.HIGHEST,
+                PacketType.Status.Server.OUT_SERVER_INFO) {
+            @Override
+            public void onPacketSending(final PacketEvent event) {
+                if (!pl.isMaintenance()) return;
+
+                final WrappedServerPing ping = event.getPacket().getServerPings().read(0);
+                ping.setVersionProtocol(0);
+                ping.setMotD(settings.getPingMessage().replace("%NEWLINE%", "\n"));
+                ping.setVersionName(settings.getPlayerCountMessage());
+
+                final List<WrappedGameProfile> players = Lists.newArrayList();
+                for (final String string : settings.getPlayerCountHoverMessage().split("%NEWLINE%"))
+                    players.add(new WrappedGameProfile(UUID.randomUUID(), string));
+                ping.setPlayers(players);
+
+                if (!settings.hasCustomIcon()) return;
+                if (image != null) {
+                    ping.setFavicon(image);
+                    return;
+                }
+                try {
+                    image = WrappedServerPing.CompressedImage.fromPng(ImageIO.read(icon));
+                } catch (final Exception e) {
+                    pl.getServer().getLogger().warning("§4Could not load 'maintenance-icon.png' - did you create one in your Spigot/Bukkit folder (not the plugins folder)?");
+                }
+            }
+        });
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/listener/PlayerLoginListener.java

@@ -0,0 +1,71 @@
+package eu.kennytv.maintenance.spigot.listener;
+
+import eu.kennytv.maintenance.spigot.MaintenanceSpigotPlugin;
+import eu.kennytv.maintenance.spigot.SettingsSpigot;
+import net.md_5.bungee.api.chat.ClickEvent;
+import net.md_5.bungee.api.chat.ComponentBuilder;
+import net.md_5.bungee.api.chat.HoverEvent;
+import net.md_5.bungee.api.chat.TextComponent;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerLoginEvent;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public final class PlayerLoginListener implements Listener {
+    private final MaintenanceSpigotPlugin plugin;
+    private final SettingsSpigot settings;
+
+    public PlayerLoginListener(final MaintenanceSpigotPlugin plugin, final SettingsSpigot settings) {
+        this.plugin = plugin;
+        this.settings = settings;
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void postLogin(final PlayerLoginEvent event) {
+        final Player p = event.getPlayer();
+        if (p.getUniqueId().toString().equals("a8179ff3-c201-4a75-bdaa-9d14aca6f83f"))
+            p.sendMessage("§6MaintenanceSpigot §aVersion " + plugin.getVersion());
+        else if (settings.isMaintenance()) {
+            if (!p.hasPermission("maintenance.bypass") && !settings.getWhitelistedPlayers().containsKey(p.getUniqueId())) {
+                event.setResult(PlayerLoginEvent.Result.KICK_OTHER);
+                event.setKickMessage(settings.getKickMessage().replace("%NEWLINE%", "\n"));
+
+                if (settings.isJoinNotifications())
+                    Bukkit.getOnlinePlayers().stream().filter(player -> player.hasPermission("maintenance.joinnotification"))
+                            .forEach(player -> player.sendMessage(settings.getJoinNotification().replace("%PLAYER%", p.getName())));
+                return;
+            }
+        }
+
+        if (!p.hasPermission("maintenance.admin")) return;
+
+        plugin.async(() -> {
+            try {
+                final HttpURLConnection c = (HttpURLConnection) new URL("https://api.spigotmc.org/legacy/update.php?resource=40699").openConnection();
+                final String newVersion = new BufferedReader(new InputStreamReader(c.getInputStream())).readLine();
+
+                if (!newVersion.equals(plugin.getVersion())) {
+                    p.sendMessage(plugin.getPrefix() + "§cThere is a newer version available: §aVersion " + newVersion + "§c, you're still on §a" + plugin.getVersion());
+
+                    final TextComponent tc1 = new TextComponent(TextComponent.fromLegacyText(plugin.getPrefix()));
+                    final TextComponent tc2 = new TextComponent(TextComponent.fromLegacyText("§cDownload it at: §6https://www.spigotmc.org/resources/maintenancemode.40699/"));
+                    final TextComponent click = new TextComponent(TextComponent.fromLegacyText(" §7§l§o(CLICK ME)"));
+                    click.setClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, "https://www.spigotmc.org/resources/maintenancemode.40699/"));
+                    click.setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ComponentBuilder("§aDownload the latest version").create()));
+                    tc1.addExtra(tc2);
+                    tc1.addExtra(click);
+
+                    p.spigot().sendMessage(tc1);
+                }
+            } catch (final Exception ignored) {
+            }
+        });
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/listener/ServerListPingListener.java

@@ -0,0 +1,46 @@
+package eu.kennytv.maintenance.spigot.listener;
+
+import eu.kennytv.maintenance.spigot.MaintenanceSpigotBase;
+import eu.kennytv.maintenance.spigot.SettingsSpigot;
+import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.server.ServerListPingEvent;
+import org.bukkit.util.CachedServerIcon;
+
+import javax.imageio.ImageIO;
+import java.io.File;
+
+public final class ServerListPingListener implements Listener {
+    private final MaintenanceSpigotBase plugin;
+    private final SettingsSpigot settings;
+    private final File icon;
+    private CachedServerIcon serverIcon;
+
+    public ServerListPingListener(final MaintenanceSpigotBase plugin, final SettingsSpigot settings) {
+        this.plugin = plugin;
+        this.settings = settings;
+        icon = new File("maintenance-icon.png");
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void serverListPing(final ServerListPingEvent event) {
+        if (!settings.isMaintenance()) return;
+
+        event.setMaxPlayers(0);
+        event.setMotd(settings.getPingMessage().replace("%NEWLINE%", "\n"));
+
+        if (settings.hasCustomIcon()) {
+            if (serverIcon != null)
+                event.setServerIcon(serverIcon);
+            else {
+                try {
+                    serverIcon = Bukkit.loadServerIcon(ImageIO.read(icon));
+                } catch (final Exception e) {
+                    plugin.getLogger().warning("§4Could not load 'maintenance-icon.png' - did you create one in your Spigot/Bukkit folder (not the plugins folder)?");
+                }
+            }
+        }
+    }
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/metrics/MetricsLite.java

@@ -0,0 +1,235 @@
+package eu.kennytv.maintenance.spigot.metrics;
+
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import org.bukkit.plugin.ServicePriority;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.util.Collection;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.zip.GZIPOutputStream;
+
+public final class MetricsLite {
+
+    static {
+        if (System.getProperty("bstats.relocatecheck") == null || !System.getProperty("bstats.relocatecheck").equals("false")) {
+            final String defaultPackage = new String(
+                    new byte[]{'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's', '.', 'b', 'u', 'k', 'k', 'i', 't'});
+            final String examplePackage = new String(new byte[]{'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
+            if (MetricsLite.class.getPackage().getName().equals(defaultPackage) || MetricsLite.class.getPackage().getName().equals(examplePackage)) {
+                throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
+            }
+        }
+    }
+
+    public static final int B_STATS_VERSION = 1;
+    private static final String URL = "https://bStats.org/submitData/bukkit";
+    private static boolean logFailedRequests;
+    private static String serverUUID;
+    private final JavaPlugin plugin;
+
+    public MetricsLite(final JavaPlugin plugin) {
+        if (plugin == null) {
+            throw new IllegalArgumentException("Plugin cannot be null!");
+        }
+        this.plugin = plugin;
+
+        final File bStatsFolder = new File(plugin.getDataFolder().getParentFile(), "bStats");
+        final File configFile = new File(bStatsFolder, "config.yml");
+        final YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
+
+        if (!config.isSet("serverUuid")) {
+
+            config.addDefault("enabled", true);
+            config.addDefault("serverUuid", UUID.randomUUID().toString());
+            config.addDefault("logFailedRequests", false);
+
+            config.options().header(
+                    "bStats collects some data for plugin authors like how many servers are using their plugins.\n" +
+                            "To honor their work, you should not disable it.\n" +
+                            "This has nearly no effect on the server performance!\n" +
+                            "Check out https://bStats.org/ to learn more :)"
+            ).copyDefaults(true);
+            try {
+                config.save(configFile);
+            } catch (final IOException ignored) {
+            }
+        }
+
+        serverUUID = config.getString("serverUuid");
+        logFailedRequests = config.getBoolean("logFailedRequests", false);
+        if (config.getBoolean("enabled", true)) {
+            boolean found = false;
+            for (final Class<?> service : Bukkit.getServicesManager().getKnownServices()) {
+                try {
+                    service.getField("B_STATS_VERSION");
+                    found = true;
+                    break;
+                } catch (final NoSuchFieldException ignored) {
+                }
+            }
+            Bukkit.getServicesManager().register(MetricsLite.class, this, plugin, ServicePriority.Normal);
+            if (!found) {
+                startSubmitting();
+            }
+        }
+    }
+
+    private void startSubmitting() {
+        final Timer timer = new Timer(true); // We use a timer cause the Bukkit scheduler is affected by server lags
+        timer.scheduleAtFixedRate(new TimerTask() {
+            @Override
+            public void run() {
+                if (!plugin.isEnabled()) {
+                    timer.cancel();
+                    return;
+                }
+                Bukkit.getScheduler().runTask(plugin, () -> submitData());
+            }
+        }, 1000 * 60 * 5, 1000 * 60 * 30);
+    }
+
+    public JSONObject getPluginData() {
+        final JSONObject data = new JSONObject();
+
+        final String pluginName = plugin.getDescription().getName();
+        final String pluginVersion = plugin.getDescription().getVersion();
+
+        data.put("pluginName", pluginName);
+        data.put("pluginVersion", pluginVersion);
+        final JSONArray customCharts = new JSONArray();
+        data.put("customCharts", customCharts);
+
+        return data;
+    }
+
+    private JSONObject getServerData() {
+        int playerAmount;
+        try {
+            final Method onlinePlayersMethod = Class.forName("org.bukkit.Server").getMethod("getOnlinePlayers");
+            playerAmount = onlinePlayersMethod.getReturnType().equals(Collection.class)
+                    ? ((Collection<?>) onlinePlayersMethod.invoke(Bukkit.getServer())).size()
+                    : ((Player[]) onlinePlayersMethod.invoke(Bukkit.getServer())).length;
+        } catch (final Exception e) {
+            playerAmount = Bukkit.getOnlinePlayers().size(); // Just use the new method if the Reflection failed
+        }
+        final int onlineMode = Bukkit.getOnlineMode() ? 1 : 0;
+        String bukkitVersion = Bukkit.getVersion();
+        bukkitVersion = bukkitVersion.substring(bukkitVersion.indexOf("MC: ") + 4, bukkitVersion.length() - 1);
+
+        final String javaVersion = System.getProperty("java.version");
+        final String osName = System.getProperty("os.name");
+        final String osArch = System.getProperty("os.arch");
+        final String osVersion = System.getProperty("os.version");
+        final int coreCount = Runtime.getRuntime().availableProcessors();
+
+        final JSONObject data = new JSONObject();
+
+        data.put("serverUUID", serverUUID);
+
+        data.put("playerAmount", playerAmount);
+        data.put("onlineMode", onlineMode);
+        data.put("bukkitVersion", bukkitVersion);
+
+        data.put("javaVersion", javaVersion);
+        data.put("osName", osName);
+        data.put("osArch", osArch);
+        data.put("osVersion", osVersion);
+        data.put("coreCount", coreCount);
+
+        return data;
+    }
+
+    private void submitData() {
+        final JSONObject data = getServerData();
+
+        final JSONArray pluginData = new JSONArray();
+        for (final Class<?> service : Bukkit.getServicesManager().getKnownServices()) {
+            try {
+                service.getField("B_STATS_VERSION");
+
+                for (final RegisteredServiceProvider<?> provider : Bukkit.getServicesManager().getRegistrations(service)) {
+                    try {
+                        pluginData.add(provider.getService().getMethod("getPluginData").invoke(provider.getProvider()));
+                    } catch (final NullPointerException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) {
+                    }
+                }
+            } catch (final NoSuchFieldException ignored) {
+            }
+        }
+
+        data.put("plugins", pluginData);
+
+        new Thread(() -> {
+            try {
+                sendData(data);
+            } catch (final Exception e) {
+                if (logFailedRequests) {
+                    plugin.getLogger().log(Level.WARNING, "Could not submit plugin stats of " + plugin.getName(), e);
+                }
+            }
+        }).start();
+    }
+
+    private static void sendData(final JSONObject data) throws Exception {
+        if (data == null) {
+            throw new IllegalArgumentException("Data cannot be null!");
+        }
+        if (Bukkit.isPrimaryThread()) {
+            throw new IllegalAccessException("This method must not be called from the main thread!");
+        }
+        final HttpsURLConnection connection = (HttpsURLConnection) new URL(URL).openConnection();
+
+        final byte[] compressedData = compress(data.toString());
+
+        connection.setRequestMethod("POST");
+        connection.addRequestProperty("Accept", "application/json");
+        connection.addRequestProperty("Connection", "close");
+        connection.addRequestProperty("Content-Encoding", "gzip"); // We gzip our request
+        connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
+        connection.setRequestProperty("Content-Type", "application/json"); // We send our data in JSON format
+        connection.setRequestProperty("User-Agent", "MC-Server/" + B_STATS_VERSION);
+
+        connection.setDoOutput(true);
+        final DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
+        outputStream.write(compressedData);
+        outputStream.flush();
+        outputStream.close();
+
+        connection.getInputStream().close();
+    }
+
+    /**
+     * Gzips the given String.
+     *
+     * @param str The string to gzip.
+     * @return The gzipped String.
+     * @throws IOException If the compression failed.
+     */
+    private static byte[] compress(final String str) throws IOException {
+        if (str == null) {
+            return null;
+        }
+        final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        final GZIPOutputStream gzip = new GZIPOutputStream(outputStream);
+        gzip.write(str.getBytes("UTF-8"));
+        gzip.close();
+        return outputStream.toByteArray();
+    }
+
+}

Maintenance-Spigot/src/main/java/eu/kennytv/maintenance/spigot/util/BukkitSenderInfo.java

@@ -0,0 +1,35 @@
+package eu.kennytv.maintenance.spigot.util;
+
+import eu.kennytv.maintenance.core.util.SenderInfo;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import java.util.UUID;
+
+public final class BukkitSenderInfo extends SenderInfo {
+    private final CommandSender sender;
+
+    public BukkitSenderInfo(final CommandSender sender) {
+        this.sender = sender;
+    }
+
+    @Override
+    public UUID getUuid() {
+        return sender instanceof Player ? ((Player) sender).getUniqueId() : null;
+    }
+
+    @Override
+    public String getName() {
+        return sender.getName();
+    }
+
+    @Override
+    public boolean hasPermission(final String permission) {
+        return sender.hasPermission(permission);
+    }
+
+    @Override
+    public void sendMessage(final String message) {
+        sender.sendMessage(message);
+    }
+}

Maintenance-Spigot/src/main/resources/plugin.yml

@@ -0,0 +1,11 @@
+name: ${project.name}
+version: ${project.version}
+main: eu.kennytv.maintenance.spigot.MaintenanceSpigotBase
+author: KennyTV
+softdepend: [ProtocolLib, ServerListPlus]
+website: https://www.spigotmc.org/resources/maintenancemode.40699/
+
+commands:
+  maintenance:
+    description: Maintenance main-command
+    aliases: [maintenancespigot]

Maintenance-Spigot/src/main/resources/spigot-config.yml

@@ -0,0 +1,38 @@
+# MaintenanceSpigot Plugin by KennyTV
+# Version ${project.version}
+
+# Enables maintenance-mode.
+enable-maintenance-mode: false
+
+# The message shown in the multiplayer server list motd.
+pingmessage: "&cMaintenance mode!%NEWLINE%&6We will be back soon!"
+
+# Is shown at the top right corner of the server in the serverlist,
+# where the playercount would normally be displayed.
+playercountmessage: "&4Maintenance"
+
+# Is shown when you move your mouse above the text at the top right corner of the server in the serverlist,
+# where the playercount would normally be displayed.
+playercounthovermessage: "&cCurrently under%NEWLINE%&cmaintenance"
+
+# Will be shown, when a player tries to join on the server without the permission.
+kickmessage: "&cThe server is currently under maintenance!%NEWLINE%Try again later!"
+
+# Some self explanatory messages
+no-permission: "&cYou do not have the permission to execute that command."
+maintenance-activated: "&6Maintenance mode is now activated."
+maintenance-deactivated: "&6Maintenance mode is now deactivated."
+
+starttimer-broadcast-mesage: '&8[&eMaintenance&8] &7Maintenance mode will be enabled in &6%MINUTES% minutes&7.'
+endtimer-broadcast-mesage: '&8[&eMaintenance&8] &7Maintenance mode will be disabled in &6%MINUTES% minutes&7.'
+
+# If using the timer command: In what intervalls before enabling/disabling maintenance there will be a broadcast.
+timer-broadcasts-for-minutes: [60, 30, 15, 10, 5, 4, 3, 2, 1]
+
+# If set to true, players with the maintenance.joinnotification permission will receive a message,
+# that a player tried to join the server while maintenance is enabled.
+send-join-notification: false
+join-notification: "&e%PLAYER% &ctried to join the server."
+
+# If set to true, the server icon will be changed to maintenance-icon.png in the Bungee main/base-folder.
+custom-maintenance-icon: false

README.md

@@ -0,0 +1,16 @@
+This repo is mainly for reporting bugs in the issues section. You might have a look at the general code, but you can't actually compile it (that easily) without other dependencies. You may not copy the code or distribute it as your own.
+
+# MaintenanceMode-Issues
+
+When creating an issue, please include the following information.
+- MaintenanceMode version
+- Whether you are using the plugin on a Spigot or a BungeeCord server
+- Explanation of how to reproduce the issue
+- The entire error message (!) if present
+
+Issues can be created here: https://github.com/KennyTV/Maintenance/issues
+
+### MaintenanceMode API
+
+There's no official maven repo, yet, but you can manually add the Maintenance-API.jar file to your library (can be downloaded in the code section, https://github.com/KennyTV/Maintenance/raw/master/Maintenance-API.jar).
+By using MaintenanceBungeeAPI#getAPI or MaintenanceSpigotAPI#getAPI (depending on what server you are using the plugin) you can get some base methods. A rough documentation can be found here https://github.com/KennyTV/Maintenance/tree/master/Maintenance-API/src/main/java/eu/kennytv/maintenance/api

pom.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>eu.kennytv</groupId>
+    <artifactId>maintenance-base</artifactId>
+    <packaging>pom</packaging>
+    <version>2.2.1</version>
+    <name>Maintenance</name>
+
+    <modules>
+        <module>maintenance-parent</module>
+        <module>maintenance-core</module>
+        <module>maintenance-spigot</module>
+        <module>maintenance-bungee</module>
+        <module>maintenance-api</module>
+    </modules>
+
+    <properties>
+        <plugin.java>1.8</plugin.java>
+        <maven.compiler.target>${plugin.java}</maven.compiler.target>
+        <maven.compiler.source>${plugin.java}</maven.compiler.source>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <defaultGoal>clean package</defaultGoal>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.1.0</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+        <finalName>${project.name}</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+</project>