further variable encapsulation

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

@@ -17,15 +17,16 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.logging.Logger;
 
 public final class Main extends JavaPlugin {
-    public static Main plugin;
-    public static PixelBlockConfiguration configuration;
-    public static PixelBlockDatabase database;
+    private static Main plugin;
+    private static PixelBlockConfiguration configuration;
+    private static PixelBlockDatabase database;
 
-    public static TaskChainFactory taskFactory;
+    private static TaskChainFactory taskFactory;
 
-    public static List<PixelBlock> pixelBlocks = new ArrayList<>();
+    public final static List<PixelBlock> pixelBlocks = new ArrayList<>();
 
     public static <T> TaskChain<T> chain() {
         return taskFactory.newChain();
@@ -98,4 +99,20 @@ public final class Main extends JavaPlugin {
             throw new RuntimeException("Failed disabling", e);
         }
     }
+
+    public static Main plugin() {
+        return plugin;
+    }
+
+    public static Logger logger() {
+        return plugin.getLogger();
+    }
+
+    public static PixelBlockDatabase database() {
+        return database;
+    }
+
+    public static PixelBlockConfiguration configuration() {
+        return configuration;
+    }
 }