prevent nether portal use and entity damage

build.gradle.kts

@@ -30,6 +30,6 @@ tasks.register<Exec>("copyJarToTestServer") {
     dependsOn(tasks.jar)
     mustRunAfter(tasks.jar)
 
-    commandLine("cp", "build/libs/WorldMuseum-1.0-SNAPSHOT.jar", "/Users/olischma/Desktop/paper/plugins")
+    commandLine("cp", "build/libs/WorldMuseum-1.0-SNAPSHOT.jar", "/media/elias/Backup/world-museum/plugins")
 
 }

src/main/java/eu/mhsl/minecraft/WorldMuseum/Main.java

@@ -20,14 +20,14 @@ import java.util.logging.Logger;
 
 public class Main extends JavaPlugin {
     private static Main instance;
-    private static Logger LOGGER;
+    private static Logger logger;
 
     private final List<ViewableWorld> worlds = new ArrayList<>();
 
     @Override
     public void onEnable() {
         Main.instance = this;
-        LOGGER = getLogger();
+        logger = logger();
         this.saveDefaultConfig();
 
         getServer().getMessenger().registerOutgoingPluginChannel(this, "BungeeCord");
@@ -47,11 +47,10 @@ public class Main extends JavaPlugin {
     public void onDisable() {
         this.worlds.forEach(ViewableWorld::unloadWorld);
     }
+
     @Override
     public ChunkGenerator getDefaultWorldGenerator(@NotNull String worldName, String id) {
-        return new ChunkGenerator() {
+        return new ChunkGenerator() {};
-
-        };
     }
 
     private void loadWorlds() {
@@ -61,9 +60,12 @@ public class Main extends JavaPlugin {
         //noinspection ResultOfMethodCallIgnored
         worldFolder.mkdirs();
         Arrays.stream(Objects.requireNonNull(worldFolder.listFiles())).forEach(file -> {
-            LOGGER.info("[Worldmuseum] Loading world " + file.getName());
+            logger.info("[Worldmuseum] Loading world " + file.getName());
-            if (file.isDirectory()) this.worlds.add(new ViewableWorld(file));
+            if (file.isDirectory()) {
-            else LOGGER.info( "[Worldmuseum] " + file.getName() + " is not a valid world!");
+                this.worlds.add(new ViewableWorld(file));
+            } else {
+                logger.info( "[Worldmuseum] " + file.getName() + " is not a directory and therefore not a valid world!");
+            }
         });
         this.worlds.forEach(ViewableWorld::loadWorld);
     }
@@ -75,4 +77,9 @@ public class Main extends JavaPlugin {
     public List<ViewableWorld> getWorlds() {
         return worlds;
     }
+
+    public static Logger logger() {
+        if(logger == null) throw new RuntimeException("Plugin not initialized yet");
+        return logger;
+    }
 }

src/main/java/eu/mhsl/minecraft/WorldMuseum/util/BungeeCord.java

@@ -12,7 +12,7 @@ import java.util.logging.Level;
 
 public class BungeeCord {
     public static void connect(Player player, String server) {
-        Main.instance().getLogger().log(Level.INFO, String.format("Bungeecord: Sending %s to %s", player.getName(), server));
+        Main.logger().log(Level.INFO, String.format("Bungeecord: Sending %s to %s", player.getName(), server));
         ByteArrayDataOutput output = ByteStreams.newDataOutput();
         output.writeUTF("Connect");
         output.writeUTF(server);

src/main/java/eu/mhsl/minecraft/WorldMuseum/viewableWorld/ViewableWorld.java

@@ -1,5 +1,6 @@
 package eu.mhsl.minecraft.WorldMuseum.viewableWorld;
 
+import eu.mhsl.minecraft.WorldMuseum.Main;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.util.TriState;
 import org.bukkit.*;
@@ -13,6 +14,7 @@ import org.bukkit.inventory.meta.ItemMeta;
 import java.io.File;
 import java.io.IOException;
 import java.util.Objects;
+import java.util.logging.Level;
 
 public class ViewableWorld {
     private final File worldLocation;
@@ -45,7 +47,9 @@ public class ViewableWorld {
                 data.set("isDefaultWorld", false);
                 data.save(configFile);
 
-            } catch (IOException e) {e.printStackTrace();}
+            } catch (IOException e) {
+                Main.logger().log(Level.SEVERE, "Failed creating Configuration File", e);
+            }
         }
     }
 

src/main/java/eu/mhsl/minecraft/WorldMuseum/viewableWorld/ViewableWorldListener.java

@@ -6,7 +6,9 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.block.BlockFromToEvent;
 import org.bukkit.event.block.BlockGrowEvent;
 import org.bukkit.event.block.BlockRedstoneEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
 import org.bukkit.event.entity.EntitySpawnEvent;
+import org.bukkit.event.player.PlayerPortalEvent;
 import org.bukkit.event.world.ChunkUnloadEvent;
 
 public class ViewableWorldListener implements Listener {
@@ -34,4 +36,12 @@ public class ViewableWorldListener implements Listener {
     public void onChunkUnload(ChunkUnloadEvent event) {
         event.setSaveChunk(false);
     }
+    @EventHandler
+    public void onEntityDamage(EntityDamageEvent event) {
+        event.setCancelled(true);
+    }
+    @EventHandler
+    public void preventPortal(PlayerPortalEvent event) {
+        event.setCancelled(true);
+    }
 }