My Mod

package net.minecraft.src;

import java.util.Random;

public class mod_wik3dcraft extends BaseMod
{
    //Blocks//
    public static final Block RavireBlock = new BlockRavireBlock(199, Material.rock).setBlockName("Ravire Ore").setHardness(3F).setResistance(4F).setStepSound(Block.soundStoneFootstep);



    //Items//
    public static final Item RavirePickaxe = (new ItemPickaxe(1000, EnumToolMaterial.RAVIRE)).setItemName("RavirePickaxe");
    public static final Item RavireSword = (new ItemSword(1001, EnumToolMaterial.RAVIRE)).setItemName("RavireSword");
    public static final Item RavireSpade = (new ItemSpade(1002, EnumToolMaterial.RAVIRE)).setItemName("RavireSpade");
    public static final Item RavireAxe = (new ItemAxe(1003, EnumToolMaterial.RAVIRE)).setItemName("RavireAxe");
    public static final Item RavireHoe = (new ItemHoe(1004, EnumToolMaterial.RAVIRE)).setItemName("RavireHoe");

    public static final Item RavireIngot = (new ItemRavireIngot(1005)).setItemName("RavireIngot");



    @Override
    public String getVersion() {
        return "wik3dcraft v0.1";
    }

    @Override
    public void load()

    {
        //Textures//
        RavireBlock.blockIndexInTexture = ModLoader.addOverride("/terrain.png", "Ravire.png");
        RavirePickaxe.iconIndex = ModLoader.addOverride("/gui/items.png", "RavirePickAxe.png");
        RavireSword.iconIndex = ModLoader.addOverride("/gui/items.png", "RavireSword.png");
        RavireSpade.iconIndex = ModLoader.addOverride("/gui/items.png", "RavireSpade.png");
        RavireAxe.iconIndex = ModLoader.addOverride("/gui/items.png", "RavireAxe.png");
        RavireHoe.iconIndex = ModLoader.addOverride("/gui/items.png", "RavireHoe.png");
        RavireIngot.iconIndex = ModLoader.addOverride("/gui/items.png", "RavireIngot.png");



        //Smelting Recipes//
        ModLoader.addSmelting(mod_wik3dcraft.RavireBlock.blockID, new ItemStack(mod_wik3dcraft.RavireIngot));



        //Registering//
        ModLoader.registerBlock(RavireBlock);

        //Adding Names//
        ModLoader.addName(RavireBlock, "Ravire Ore");
        ModLoader.addName(RavirePickaxe, "Ravire Pickaxe");
        ModLoader.addName(RavireSword, "Ravire Sword");
        ModLoader.addName(RavireSpade, "Ravire Shovel");
        ModLoader.addName(RavireAxe, "Ravire Axe");
        ModLoader.addName(RavireHoe, "Ravire Hoe");
        ModLoader.addName(RavireIngot, "Ravire Ingot");



        //Crafting Recipes//
        ModLoader.addRecipe(new ItemStack(RavireBlock, 64), new Object[]{
                "DDD", "DDD", "DDD",'D', Block.dirt
            });
        ModLoader.addRecipe(new ItemStack(mod_wik3dcraft.RavirePickaxe, 1), new Object[]{
            "RRR", " Y ", " Y ", 'R',  mod_wik3dcraft.RavireBlock , 'Y', Item.stick
        });
        ModLoader.addRecipe(new ItemStack(mod_wik3dcraft.RavireSword, 1), new Object[]{
            " R ", " R ", " Y ", 'R',  mod_wik3dcraft.RavireBlock , 'Y', Item.stick
        });
        ModLoader.addRecipe(new ItemStack(mod_wik3dcraft.RavireSpade, 1), new Object[]{
            " R ", " Y ", " Y ", 'R',  mod_wik3dcraft.RavireBlock , 'Y', Item.stick
        });
        ModLoader.addRecipe(new ItemStack(mod_wik3dcraft.RavireAxe, 1), new Object[]{
            "RR ", "RY ", " Y ", 'R',  mod_wik3dcraft.RavireBlock , 'Y', Item.stick
        });
        ModLoader.addRecipe(new ItemStack(mod_wik3dcraft.RavireHoe, 1), new Object[]{
            "RR ", " Y ", " Y ", 'R',  mod_wik3dcraft.RavireBlock , 'Y', Item.stick
        });







    }






public void generateSurface(World world, Random random, int chunkX, int chunkZ)
{
    for (int i = 0; i < 50; i++)
    {
        int randPosX = chunkX + random.nextInt(16);
        int randPosY = random.nextInt(128);
        int randPosZ = chunkZ + random.nextInt(16);
        (new WorldGenMinable(mod_wik3dcraft.RavireBlock.blockID, 60)).generate(world, random, randPosX, randPosY, randPosZ);
    }

}



}



BlockRavireBlock.Java

package net.minecraft.src;

import java.util.Random;

public class BlockRavireBlock extends Block
{

    protected BlockRavireBlock(int i, Material material)
    {
        super(i, material);

    }

    public int quantityDropped(int par1, int par2)
    {
        return 1;
    }

    public int idDropped(int par1, Random random, int par2)
    {
        return mod_wik3dcraft.RavireBlock.blockID;
    }
}

ItemRavireIngot:


package net.minecraft.src;

public class ItemRavireIngot extends Item{

    public ItemRavireIngot(int par1) {

        super(par1);
    }

}



The Error:



java.lang.IllegalArgumentException: Illegal object for naming null
    at cpw.mods.fml.client.FMLClientHandler.getObjectName(FMLClientHandler.java:817)
    at cpw.mods.fml.common.FMLCommonHandler.addNameForObject(FMLCommonHandler.java:469)
    at net.minecraft.src.ModLoader.addName(ModLoader.java:142)
    at net.minecraft.src.ModLoader.addName(ModLoader.java:130)
    at net.minecraft.src.tutorial.mod_mymod.addNames(mod_mymod.java:33)
    at net.minecraft.src.tutorial.mod_mymod.load(mod_mymod.java:21)
    at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)
    at cpw.mods.fml.common.Loader.modInit(Loader.java:273)
    at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)
    at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)
    at net.minecraft.client.Minecraft.startGame(Minecraft.java:429)
    at net.minecraft.client.Minecraft.run(Minecraft.java:738)
    at java.lang.Thread.run(Thread.java:680)