Bukkit script funzt nicht

package me.stenh.bukkit;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
public class bukkit extends JavaPlugin {
	public void onDisable () 
	{
		
		
		
	}
	public void onEnable()
	{
		
		
	}
	public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
	if(!(sender instanceof Player))
		{
			return false;
			
		}
		Player p = (Player) sender;
		if (cmd.getName().equalsIgnoreCase("infost"))
			{
			if (!(args.length != 0))
			{
				return false;
			}
			p.sendMessage(ChatColor.GREEN + "Es wird das Plugin Bukkit verwendet by stenh!");	
			return true;	
			}
		if (cmd.getName().equalsIgnoreCase("heal"))
			{
			if (!(args.length != 0))
			{
				return false;
			}
			p.setHealth(20);
			p.sendMessage(ChatColor.GREEN + "Es wird das Plugin Bukkit verwendet by stenh!");	
			return true;	
			}
		return false;
	}
}