Development Assistance Need help expanding on this concept

Hi everyone! I am making a replica of the plugin called "Superheat" and I want to expand it so it does the same thing for iron and gold ore as it does for stone. Any idea how I could do this? Thanks!

Here is my listener file

Code:

package me.sammyg7241.sp;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;

@SuppressWarnings("unused")
public class SuperPickListener implements Listener{

    @EventHandler
    public void onBlockBreak(BlockBreakEvent event) {
       
        if(event.isCancelled())
            return;
        if(!event.getPlayer().hasPermission("superpick.toggle"))
            return;
        if(!SuperPick.instance.SuperPickUsers.contains(event.getPlayer()))
            return;
        if(!event.getPlayer().getItemInHand().getType().equals(Material.DIAMOND_PICKAXE))
            return;
        if(!event.getBlock().getType().equals(Material.STONE))
            return;
        if(SuperPick.instance.useCoal) {
            if(!event.getPlayer().getInventory().contains(Material.COAL)){
                return;
           
            }
        }
       
        event.setCancelled(true);
        event.getBlock().setType(Material.AIR);
        event.getBlock().getWorld().dropItemNaturally(event.getBlock().getLocation(), new ItemStack(Material.STONE));
    }
   
    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent event) {
        if(event.isCancelled())
            return;
        if(!event.getPlayer().hasPermission("superpick.toggle"))
            return;
        if(!event.getAction().equals(Action.RIGHT_CLICK_BLOCK))
            return;
        if(!event.getPlayer().getItemInHand().getType().equals(Material.DIAMOND_PICKAXE))
            return;
       
        Player player = event.getPlayer();
       
        if(SuperPick.instance.SuperPickUsers.contains(player)) {
            SuperPick.instance.SuperPickUsers.remove(player);
            player.sendMessage(ChatColor.DARK_RED + "[SP] SuperPick has been toggled off!");
        }else {
            SuperPick.instance.SuperPickUsers.add(player);
            player.sendMessage(ChatColor.DARK_RED + "[SP] SuperPick has been toggled on!");
        }
           
    }

   

   
}