public class Main extends JavaPlugin{

   public final static HashMap<Entity, EntityData> shotprojectiledata = new HashMap<Entity, EntityData>();

    public class EntityData {
    private Location firedfrom;
    private Integer range;
    private Double damage;
     public EntityData(Location loc, Integer range, Double damage) {
        this.firedfrom = loc;
        this.range = range;
        this.damage = damage;
    }
    public Location getFiredFrom() {
        return firedfrom;
    }
    public Integer getRange() {
        return range;
    }
    public Double getDamage() {
        return damage;
    }
}
   public void onEnable() {
           getLogger().info("wow much enable :^]");
   }

   public void onDisable() {
           getLogger().info("wow many disable doge sad :c");
   }


@EventHandler
public void onHit(EntityDamageByEntityEvent event) {
    if (event.getDamager() instanceof Snowball) {
        if (shotprojectiledata.containsKey(event.getDamager())) {
            EntityData eventdata = shotprojectiledata.get(event.getDamager());
            if (event.getEntity().getLocation().distance(eventdata.getFiredFrom())<=eventdata.getRange()) {
                event.setDamage(eventdata.getDamage());
                shotprojectiledata.remove(event.getDamager());
            }
        }
    }
}
   @EventHandler
public void eva (PlayerInteractEvent e) {
        /*
        I would recommend putting stuff in here to check if the are right clicking air, holding a certain item, or whatever you want.
       */
	Location location = player.getEyeLocation();
    BlockIterator blocksToAdd = new BlockIterator(location, 0D, 15);
    Location blockToAdd;
    while(blocksToAdd.hasNext()) {
            if (blockToAdd.getBlock().getType() != Material.AIR ||!shotprojectiledata.containsKey(projectile)) {
                    break;
            }
            blockToAdd = blocksToAdd.next().getLocation();
            player.getWorld().playEffect(blockToAdd, Effect.STEP_SOUND, Material.FIRE);
    }
    Snowball projectile = player.launchProjectile(Snowball.class);
    EntityData data = new EntityData(projectile.getLocation(), 15, 5D);
    shotprojectiledata.put(projectile, data);
    for (Player p : Bukkit.getOnlinePlayers()) {
        ((CraftPlayer)p).getHandle().playerConnection.sendPacket(new  PacketPlayOutEntityDestroy(((CraftSnowball) projectile).getHandle().getId()));
    	}
   }