improve code quality and logic

- use sealed/non-sealed system for Advisory -> AbstractAdvisory
- remove plugin field from module manager, as this was never used
- bumped version number to 0.1.1-SNAPSHOT to indicate development

gradle.properties

@@ -2,7 +2,7 @@
 name = Szlaban
 description = A multi-functional security plugin for keeping your server safe.
 website = https://github.com/PiotrWey/Szlaban
-version = 0.1
+version = 0.1.1-SNAPSHOT
 
 # authorship
 authors = [ PiotrWey ]

src/main/java/dev/piotr_weychan/szlaban/Szlaban.java

@@ -38,7 +38,7 @@ public final class Szlaban extends JavaPlugin {
   private final EnumSet<Capability> capabilities;
 
   public Szlaban() {
-    this.moduleManager = new ModuleManager(this);
+    this.moduleManager = new ModuleManager(/* this */);
     this.capabilities = EnumSet.noneOf(Capability.class);
   }
 

src/main/java/dev/piotr_weychan/szlaban/advisor/advisory/AbstractAdvisory.java

@@ -9,7 +9,7 @@ package dev.piotr_weychan.szlaban.advisor.advisory;
 
 import net.kyori.adventure.text.ComponentLike;
 
-public abstract class AbstractAdvisory implements Advisory {
+public abstract non-sealed class AbstractAdvisory implements Advisory {
   private final String name;
   private final ComponentLike description;
   private final ComponentLike reason;

src/main/java/dev/piotr_weychan/szlaban/advisor/advisory/Advisory.java

@@ -10,7 +10,8 @@ package dev.piotr_weychan.szlaban.advisor.advisory;
 import net.kyori.adventure.text.ComponentLike;
 
 
-public interface Advisory {
+public sealed interface Advisory
+    permits AbstractAdvisory {
   String getName();
   ComponentLike getDescription();
   ComponentLike getReason();

src/main/java/dev/piotr_weychan/szlaban/module/ModuleManager.java

@@ -7,7 +7,7 @@
 
 package dev.piotr_weychan.szlaban.module;
 
-import org.bukkit.plugin.java.JavaPlugin;
+//import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.Unmodifiable;
@@ -20,10 +20,10 @@ public final class ModuleManager {
   private final Map<String, Supplier<Module>> moduleSuppliers = new HashMap<>();
   private final Map<String, Module> modules = new HashMap<>();
 
-  private final JavaPlugin plugin;
+//  private final JavaPlugin plugin;
 
-  public ModuleManager(JavaPlugin plugin) {
-    this.plugin = plugin;
+  public ModuleManager(/* JavaPlugin plugin */) {
+    // this.plugin = plugin;
   }
 
   /**