package net.thereturningvoid.ethercraft.blockpatches;

import net.minecraft.server.v1_8_R3.*;

public class AnvilPatch extends BlockAnvil {

    @Override
    public boolean d() {
        return true;
    }

    @Override
    public boolean c() {
        return true;
    }

    @Override
    public AnvilPatch c(float f) {
        super.c(f);
        return this;
    }

    @Override
    public AnvilPatch a(StepSound s) {
        super.a(s);
        return this;
    }

    @Override
    public AnvilPatch b(float f) {
        super.b(f);
        return this;
    }
}

In the onEnable() method of my main class, I also add this line:
Block.REGISTRY.a(145, new MinecraftKey("anvil"), new AnvilPatch().c(50.0F).a(new Block.StepSound("anvil", 0.3F, 1.0F) {
    @Override
    public String getBreakSound() { return "dig.stone" }
    @Override
    public String getPlaceSound() { return "random.anvil_land"}
  }).b(2000.0F).c("anvil");