Player Listener Won't Work!

So I am trying to make an event happen when a player uses an item

Code for when the player interacts with blocks:

Code:java

@EventHandler(priority=EventPriority.HIGH)
    public void onPlayerUse(PlayerInteractEvent event){
        Player p = event.getPlayer();
          if(event.getAction() == Action.RIGHT_CLICK_BLOCK) {
              event.getClickedBlock();
                  if(event.getClickedBlock().equals(Material.EMERALD_BLOCK)){
                      p.playSound(p.getLocation(), Sound.IRONGOLEM_HIT, 7, 12);
                      p.sendMessage(ChatColor.GREEN + "Success!");
                  }

and for when the player interacts with items::

Code:java

if(p.getItemInHand().getType() == Material.BLAZE_POWDER){
            Fireball fire = p.getWorld().spawn(event.getPlayer().getLocation(), Fireball.class);
            fire.setShooter(p);
        }

It would be much appreciated if you guys could help me make this work