Fix some more stuff

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java

@@ -28,6 +28,7 @@ import org.bukkit.Location;
 import javax.annotation.Nullable;
 import java.io.File;
 import java.util.Optional;
+import java.util.UUID;
 
 public interface Region {
 
@@ -35,6 +36,8 @@ public interface Region {
         return RegionSystem.INSTANCE.get(location);
     }
 
+    UUID getID();
+
     RegionType getType();
 
     <T extends Enum<T> & Flag.Value<T>> RegionFlagPolicy hasFlag(@NonNull Flag<T> flag);