Solved Where to add a permission to a plugin with no commands?

I'm currently learning Java, so I decided to decompile some plugins in order to learn what makes them tick. There is one plugin that I always wish had a single permission so that it could be used as a donator perk and that is SethBling's (youtuber) Homing Arrows plugin. Unfortunately, Seth doesn't add permissions to any of his plugins as he doesn't expect them to be used on large servers. I no longer have a server anymore, so I won't be using this plugin on my server.
So anyway, here is the decompiled code (it is two class files). Just tell me at which line number I should add the permission and the best way to approach it. Thank you!

Class File #1

Code:java

package com.sethbling.blinghomingarrows;
 
import java.util.logging.Logger;
import org.bukkit.Location;
import org.bukkit.Server;
import org.bukkit.entity.Arrow;
import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityShootBowEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.util.Vector;
 
public class BlingHomingArrows
  extends JavaPlugin
  implements Listener
{
  public void onEnable()
  {
    getLogger().info("BlingGravity has been loaded.");
    getServer().getPluginManager().registerEvents(this, this);
  }
 
  public void onDisable()
  {
    getLogger().info("BlingGravity has been unloaded.");
  }
 
  @EventHandler
  public void eventArrowFired(EntityShootBowEvent e)
  {
    if (((e.getEntity() instanceof LivingEntity)) && ((e.getProjectile() instanceof Arrow)))
    {
      LivingEntity player = e.getEntity();
 
      double minAngle = 6.283185307179586D;
      Entity minEntity = null;
      for (Entity entity : player.getNearbyEntities(64.0D, 64.0D, 64.0D)) {
        if ((player.hasLineOfSight(entity)) && ((entity instanceof LivingEntity)) && (!entity.isDead()))
        {
          Vector toTarget = entity.getLocation().toVector().clone().subtract(player.getLocation().toVector());
          double angle = e.getProjectile().getVelocity().angle(toTarget);
          if (angle < minAngle)
          {
            minAngle = angle;
            minEntity = entity;
          }
        }
      }
      if (minEntity != null) {
        new HomingTask((Arrow)e.getProjectile(), (LivingEntity)minEntity, this);
      }
    }
  }
}

Class File #2

Code:java

package com.sethbling.blinghomingarrows;
 
import org.bukkit.Effect;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.Arrow;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.util.Vector;
 
public class HomingTask
  extends BukkitRunnable
{
  private static final double MaxRotationAngle = 0.12D;
  private static final double TargetSpeed = 1.4D;
  Arrow arrow;
  LivingEntity target;
 
  public HomingTask(Arrow arrow, LivingEntity target, Plugin plugin)
  {
    this.arrow = arrow;
    this.target = target;
    runTaskTimer(plugin, 1L, 1L);
  }
 
  public void run()
  {
    double speed = this.arrow.getVelocity().length();
    if ((this.arrow.isOnGround()) || (this.arrow.isDead()) || (this.target.isDead()))
    {
      cancel();
      return;
    }
    Vector toTarget = this.target.getLocation().clone().add(new Vector(0.0D, 0.5D, 0.0D)).subtract(this.arrow.getLocation()).toVector();
 
    Vector dirVelocity = this.arrow.getVelocity().clone().normalize();
    Vector dirToTarget = toTarget.clone().normalize();
    double angle = dirVelocity.angle(dirToTarget);
 
 
 
    double newSpeed = 0.9D * speed + 0.13999999999999999D;
    if (((this.target instanceof Player)) && (this.arrow.getLocation().distance(this.target.getLocation()) < 8.0D))
    {
      Player player = (Player)this.target;
      if (player.isBlocking()) {
        newSpeed = speed * 0.6D;
      }
    }
    Vector newVelocity;
    Vector newVelocity;
    if (angle < 0.12D)
    {
      newVelocity = dirVelocity.clone().multiply(newSpeed);
    }
    else
    {
      Vector newDir = dirVelocity.clone().multiply((angle - 0.12D) / angle).add(dirToTarget.clone().multiply(0.12D / angle));
      newDir.normalize();
      newVelocity = newDir.clone().multiply(newSpeed);
    }
    this.arrow.setVelocity(newVelocity.add(new Vector(0.0D, 0.03D, 0.0D)));
    this.arrow.getWorld().playEffect(this.arrow.getLocation(), Effect.SMOKE, 0);
  }
}

 

croc122 You can put player.hasPermission() anywhere you like

 

AdamQpzm okay thanks, wasn't sure if it mattered where