FireBow Bukkit Plugin

package firebow;

import java.util.logging.Logger;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.event.EntityShootBowEvent;
import org.bukkit.entity.TNTPrimed;
import org.bukkit.World;
import org.bukkit.entity.Entity;
import org.bukkit.util.Vector;

public class FireBow extends JavaPlugin implements Listener {
  public static Logger log = Logger.getLogger("Minecraft");
  public void onEnable() {
    log.info("[FireBow] Start up.");
    getServer().getPluginManager().registerEvents(this, this);
  }
  public void onReload() {
    log.info("[FireBow] Server reloaded.");
  }
  public void onDisable() {
    log.info("[FireBow] Server stopping.");
  }

  @EventHandler
  public void onArrowLaunch(EntityShootBowEvent event) {
    Entity arrow = event.getProjectile();
    World world = arrow.getWorld();
    Vector vel = arrow.getVelocity();
    Entity tnt = world.spawn(arrow.getLocation(), TNTPrimed.class);
    tnt.setVelocity(vel);


    event.setCancelled(true);
  }
}