gistfile1.txt

    public function onBlockPlaceEvent(BlockPlaceEvent $event)
    {
        $event->getBlock()->setMetadata("test", new ProtectMeta($this->plugin));
    }

    public function onBlockBreakEvent(BlockBreakEvent $event)
    {
        if ($event->getBlock()->hasMetadata("test")) {
            $event->getPlayer()->sendMessage("BlockBreak");
        }
    }