Add Override annotations where appropriate

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/event/hanging/HangingBreakEvent.java

@@ -28,10 +28,12 @@ public class HangingBreakEvent extends HangingEvent implements Cancellable {
         return cause;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }

paper-api/src/main/java/org/bukkit/event/hanging/HangingPlaceEvent.java

@@ -56,10 +56,12 @@ public class HangingPlaceEvent extends HangingEvent implements Cancellable {
         return blockFace;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }