My Mod

assets.flyffmc.textures.items
    Hier liegt meine uranium.png

assets.flyffmc.models.item
    uranium.json
        {
            "parent": "item/generated",
            "textures": {
                "layer0": "flyffmc:items/uranium"
            }
        }

BasicItem.java
    package items;
    import net.minecraft.item.Item;
    public class BasicItem extends Item{
        public BasicItem(String name) {
            setUnlocalizedName(name);
            setRegistryName(name);
        }
    }

ItemUranium.java
    package items;
    public class ItemUranium extends BasicItem{
        public ItemUranium() {
            super("uranium");
        }
    }

FlyffMc.java
    package main;
    import items.BasicItem;
    import items.ItemUranium;
    import net.minecraftforge.fml.common.Mod;
    import net.minecraftforge.fml.common.SidedProxy;
    import net.minecraftforge.fml.common.Mod.EventHandler;
    import net.minecraftforge.fml.common.event.FMLInitializationEvent;
    import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
    import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
    import net.minecraftforge.fml.common.registry.GameRegistry;
    import proxy.ServerProxy;
    @Mod(modid = FlyffMc.MODID)
    public class FlyffMc {
        public static final String MODID = "flyffmc";
        @SidedProxy(clientSide = "proxy.ClientProxy", serverSide = "proxy.ServerProxy")
        public static ServerProxy proxy;
        public static ItemUranium uranium = new ItemUranium();
        @EventHandler
        public void preInit(FMLPreInitializationEvent event){
            GameRegistry.register(uranium);
        }
        @EventHandler
        public void init(FMLInitializationEvent event){
            proxy.RegisterClientStuff();
        }
        @EventHandler
        public void postInit(FMLPostInitializationEvent event){
        }
    }

ClientProxy.java
    package proxy;
    import items.BasicItem;
    import main.FlyffMc;
    import net.minecraft.client.Minecraft;
    import net.minecraft.client.renderer.block.model.ModelResourceLocation;
    public class ClientProxy extends ServerProxy {
        @Override
        public void RegisterClientStuff() {
            registerItemModel(FlyffMc.uranium);
        }
        public static void registerItemModel(BasicItem item){
            Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(item, 0, new ModelResourceLocation(FlyffMc.MODID + ":" + item.getRegistryName(), "inventory"));
        }
    }

ServerProxy.java
    package proxy;
    public class ServerProxy {
        public void RegisterClientStuff() {}
    }