NoWorkBench Code

package me.ZygoZ;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

public class NoWorkBench extends JavaPlugin implements Listener {

        public static Material[] banList = {Material.WORKBENCH};

        public void onEnable(){
                PluginManager pm = Bukkit.getPluginManager();
                pm.registerEvents(this, this);
        }

        @EventHandler

        public void onBlockPlace(BlockPlaceEvent event) {
                Material block = event.getBlock().getType();
                Player player = event.getPlayer();

                for(Material blocked : banList) {
                        if(blocked == block) {
                                if(player.isOp()) {

                                }
                                else {
                                        event.getBlock().setType(Material.AIR);
                                        player.sendMessage(ChatColor.RED + "[NoWorkBench]" + ChatColor.DARK_RED + " Du må ikke crafte!");
                                }
                        }


                }
        }


}