Minecraft Modding

package com.dude_808.Main;

import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;

import com.blocks.items.Stuff_I;

import cpw.mods.fml.common.IWorldGenerator;

public class WorldGeneration implements IWorldGenerator{

	public static void initWorldGen(){}

		private void generateSurface(World world, Random random, int x, int z)
		{

		}

		private void generateNether(World world, Random random, int x, int z)
		{

		}

		private void generateEnd(World world, Random random, int x, int z)
		{

		}

		private void addOreSpawn(Block block, World world, Random random, int blockXPos, int blockZPos, int maxX, int maxZ, int maxVeinSize, int chanceToSpawn, int minY, int maxY)
		{
			for (int i = 0; i < chanceToSpawn; i++)
			{
				int posX = blockXPos + random.nextInt(maxX);
				int posY = minY + random.nextInt(maxY - minY);
				int posZ = blockZPos + random.nextInt(maxZ);
				new WorldGenMinable(block, maxVeinSize).generate(world, random, posX, posY, posZ);}

		}

		public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider)
		{
			switch (world.provider.dimensionId)
			{
	    		case 0:
	    			generateSurface(world, random, chunkX * 16, chunkZ * 16);
	    			addOreSpawn(Stuff_I.flickeriumore, world, random, chunkX, chunkZ, 16, 16, 4 + random.nextInt(3), 9, 35, 128);
	    			addOreSpawn(Stuff_I.blackironore, world, random, x, z, 16, 16 , 3 + random.nextInt(2), 3, 0, 11);
	    		case -1:
	    			generateNether(world, random, chunkX * 16, chunkZ * 16);
	    		case 1:
	    			generateEnd(world, random, chunkX * 16, chunkZ * 16);
			}

		}}