Generic cleanup of warnings, whitespace and style.

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

@@ -5,13 +5,14 @@ import org.bukkit.Material;
 
 /**
  * Called when we try to place a block, to see if we can build it here or not.
- *<p />
+ * <p />
  * Note:
  * <ul>
- *    <li>The Block returned by getBlock() is the block we are trying to place on, not the block we are trying to place.</li>
- *    <li>If you want to figure out what is being placed, use {@link #getMaterial()} or {@link #getMaterialId()} instead.</li>
+ * <li>The Block returned by getBlock() is the block we are trying to place on, not the block we are trying to place.</li>
+ * <li>If you want to figure out what is being placed, use {@link #getMaterial()} or {@link #getMaterialId()} instead.</li>
  * </ul>
  */
+@SuppressWarnings("serial")
 public class BlockCanBuildEvent extends BlockEvent {
     protected boolean buildable;
     protected int material;