Test Plugin for Block Placing

package com.elmakers.mine.bukkit.plugins.test;

import java.util.HashMap;
import java.util.Map;

import org.bukkit.Bukkit;
import org.bukkit.Effect;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.scheduler.BukkitScheduler;

public class TestPlugin extends JavaPlugin implements Listener {
    Map<Location, Integer> TDs = new HashMap<Location, Integer>();

    @EventHandler
    public void onBlockPlace(final BlockPlaceEvent event){
        //(event.getPlayer().hasPermission("SM.SnowMachine")) &&
            if (event.getBlock().getType().equals(Material.GLOWSTONE)) {
                    Location Sml = event.getBlock().getLocation();
                    getLogger().info("Broke block at " + Sml.getWorld() + ":" + Sml.getX() + "," + Sml.getY() + "," + Sml.getZ());

              this.SnowMachine(Sml);
            }
    }

    @EventHandler
    public void onBlockBreak(BlockBreakEvent event){
        // (event.getPlayer().hasPermission("SM.SnowMachine")) &&
            Location Sml3 = event.getBlock().getLocation();
            Location equivalent = new Location(Sml3.getWorld(), Sml3.getX(), Sml3.getY(), Sml3.getZ());
            if (event.getBlock().getType().equals(Material.GLOWSTONE)) {
                    getLogger().info("Broke block at " + equivalent.getWorld() + ":" + equivalent.getX() + "," + equivalent.getY() + "," + equivalent.getZ());
             if(TDs.containsKey(equivalent)){
                 int taskID = TDs.get(equivalent);
                 getLogger().info("Cancelling task with id " + taskID);
                    Bukkit.getScheduler().cancelTask(taskID);
               } else {
                       Bukkit.broadcastMessage("I can't find that one! D': "+TDs.values().toString());
                       Bukkit.broadcastMessage(""+equivalent); //Debug messages
               }
            }
    }

    public void SnowMachine(final Location Sml) {
        Location equivalent = new Location(Sml.getWorld(), Sml.getX(), Sml.getY(), Sml.getZ());
        BukkitScheduler scheduler = Bukkit.getServer().getScheduler();
        int taskID = scheduler.scheduleSyncRepeatingTask(this, new BukkitRunnable() {
                 public void run() {
                     Sml.getWorld().playEffect(Sml, Effect.SMOKE, 0);
                 }
         }, 20, 5);
         TDs.put(equivalent, taskID);
         getLogger().info("Started task with id " + taskID);
    }

    public void onEnable() {
        PluginManager pm = getServer().getPluginManager();

        pm.registerEvents(this, this);
    }
}