MainClass 3

    @EventHandler
    public void init(FMLInitializationEvent event){
        registerBlock(new PetrifiedLog(), "petrifiedWood");
        OreDictionary.registerOre("stone", PetrifiedLog.block);
    }

    @EventHandler
    public void postInit(FMLPostInitializationEvent event){

    }

    void registerBlock(Block block, String registryName){

        block.setRegistryName(registryName);
        block.setUnlocalizedName(block.getRegistryName().toString());

        ItemBlock item = new ItemBlock(block);

        item.setRegistryName(registryName);
        item.setUnlocalizedName(block.getRegistryName().toString());
        GameRegistry.register(block);
        GameRegistry.register(item);
    }