BlockRegen

package blockregen;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.BlockState;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityExplodeEvent;
import org.bukkit.plugin.java.JavaPlugin;


public class BlockRegen extends JavaPlugin implements Listener {

	public void onEnable(){
		Bukkit.getServer().getLogger().info(ChatColor.RED + "BlockRegen v1.1 enabled");
		Bukkit.getServer().getPluginManager().registerEvents(this, this);
	}

	@EventHandler
	public void onEntityExplode(EntityExplodeEvent e) {
		for (Block b : e.blockList()){
			final BlockState state = b.getState();

			b.setType(Material.AIR);

			int delay = 100;

			if ((b.getType() == Material.SAND) || (b.getType() == Material.GRAVEL)){
				delay += 1;
			if ((b.getType() == Material.SIGN))
				delay +=1;

			}
			Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable(){

				public void run(){
					state.update(true, false);

				}
			}

			, delay);
	}
}
}