Generic cleanup of warnings, whitespace and style.

src/main/java/org/bukkit/event/block/BlockPhysicsEvent.java

@@ -7,6 +7,7 @@ import org.bukkit.event.Cancellable;
 /**
  * Thrown when a block physics check is called
  */
+@SuppressWarnings("serial")
 public class BlockPhysicsEvent extends BlockEvent implements Cancellable {
     private final int changed;
     private boolean cancel = false;