Per-world Creeper settings complete

- Added per-world Block Damage settings
- Added per-world Entity Damage settings
- Added creeper_settings database support
- Added world-specific Creeper menus
- Added automatic world registration/default inheritance
- Split Creeper listeners
- Updated Creeper behavior to use world settings
- Removed obsolete global Creeper indicators
- Adopted logger-based error reporting standard

src/main/java/com/rsscripting/serveradmin/database/DatabaseManager.java

@@ -22,7 +22,15 @@ public class DatabaseManager {
         File dataFolder = plugin.getDataFolder();
 
         if (!dataFolder.exists()) {
-            dataFolder.mkdirs();
+
+            if (!dataFolder.mkdirs()) {
+
+                throw new SQLException(
+                        "Failed to create plugin data folder."
+                );
+
+            }
+
         }
 
         File databaseFile = new File(
@@ -86,6 +94,20 @@ public class DatabaseManager {
                     """
             );
 
+            statement.execute(
+                    """
+                    CREATE TABLE IF NOT EXISTS equipment_drop_settings (
+                        world_name TEXT PRIMARY KEY,
+                        helmet INTEGER NOT NULL,
+                        chestplate INTEGER NOT NULL,
+                        leggings INTEGER NOT NULL,
+                        boots INTEGER NOT NULL,
+                        main_hand INTEGER NOT NULL,
+                        off_hand INTEGER NOT NULL
+                    )
+                    """
+            );
+
         }
     }