Quick example on auto tileentity registration

example.java

public <T extends Block> T register(T block)
{
    GameRegistry.register(block);
    if(block instanceof ITileEntityProvider)
    {
        HasTileEntity teInfo = block.getClass().getDeclaredAnnotation(HasTileEntity.class);
        if(hasTe != null)
        {
            GameRegistry.registerTileEntity(teInfo.tileEntityClass(), teInfo.registryName());
        }
        else
        {
            throw new IllegalStateException("Unable to register TileEntity: Block "+block.getClass()+" is a tile entity provider but doesnt have a @HasTileEntity annotation");
        }
    }
    return block;
}

HasTileEntity.java

package net.xalcon.ecotec.experimental;

import net.minecraft.tileentity.TileEntity;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Retention(RetentionPolicy.RUNTIME) // this means the annotation is available at runtime and will not be stripped by the compiler
public @interface HasTileEntity
{
	Class<? extends TileEntity> tileEntityClass();
	String registryName();
}

TestBlock.java

package net.xalcon.ecotec.experimental.blocks;

import net.minecraft.block.Block;
import net.minecraft.block.ITileEntityProvider;
import net.minecraft.block.material.MapColor;
import net.minecraft.block.material.Material;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;
import net.xalcon.ecotec.Ecotec;
import net.xalcon.ecotec.experimental.HasTileEntity;
import net.xalcon.ecotec.experimental.tileentities.TestTile;

import javax.annotation.Nullable;

@HasTileEntity(tileEntityClass = TestTile.class, registryName = Ecotec.MODID + ".test_tile")
public class TestBlock extends Block implements ITileEntityProvider
{
	public TestBlock(Material blockMaterialIn, MapColor blockMapColorIn)
	{
		super(blockMaterialIn, blockMapColorIn);
	}

	@Nullable
	@Override
	public TileEntity createNewTileEntity(World worldIn, int meta)
	{
		return new TestTile();
	}
}