Implemented BLOCK_CANBUILD, had wrong Listener method name

By: durron597 <martin.jared@gmail.com>

paper-api/src/org/bukkit/event/block/BlockCanBuildEvent.java

@@ -12,15 +12,26 @@ import org.bukkit.event.Cancellable;
 public class BlockCanBuildEvent extends BlockEvent implements Cancellable {
 	protected boolean cancel;
 	
-	public BlockCanBuildEvent(Type type, Block block) {
+	public BlockCanBuildEvent(Type type, Block block, boolean canBuild) {
 		super(type, block);
+		
+		cancel = canBuild;
 	}
-	
+
+	/**
+	 * Returns whether or not the block can be built here. By default, returns
+	 * Minecraft's answer on whether the block can be built
+	 * 
+	 * @return boolean whether or not the block can be built
+	 */
 	@Override
 	public boolean isCancelled() {
 		return cancel;
 	}
-
+	
+	/**
+	 * Set whether the block can be built here.
+	 */
 	@Override
 	public void setCancelled(boolean cancel) {
 		this.cancel = cancel;

paper-api/src/org/bukkit/event/block/BlockListener.java

@@ -25,7 +25,7 @@ public class BlockListener implements Listener {
     /**
      * Called when we try to place a block, to see if we can build it
      */
-    public void canBuild(BlockCanBuildEvent event) {
+    public void onBlockCanBuild(BlockCanBuildEvent event) {
     }
     
     /**