Adding Fuel Minecraft Code

MOD_FILE CONTENTS:

package net.minecraft.src;

import java.util.Random;

public class mod_tutorial extends BaseMod
{

    //Blocks

    //Items

    public static final Item Neutron = (new ItemNeutron(1009).setItemName("Neutron"));


    public void load()
    {

        Neutron.iconIndex = ModLoader.addOverride("/gui/items.png","/Items/neutroncatalyst.png");

        //Registering

        //Adding names

        ModLoader.addName(Neutron,"Neutron Catalyst");

        //Crafting Recipes

        //Smelting Recipes

        //Shapeless Recipes

        ModLoader.addShapelessRecipe(new ItemStack(mod_tutorial.Neutron, 1), new Object[]
                {
                    Item.enderPearl, Item.diamond           //Crafting Line
                });

    }

    public int addFuel(int i, int j)
    {
        if (i == mod_tutorial.Neutron.shiftedIndex)
        {
            return 20000;
        }

        return 0;
    }

    public String getVersion()
    {
        return "1.2.5";
    }
}


NEUTRON CATALYST ITEM FILE :

package net.minecraft.src;

public class ItemNeutron extends Item
{
    public ItemNeutron(int par1)
    {
        super(par1);
    }
}