// AbstractFurnaceBlockEntity
public static Map<Item, Integer> createFuelTimeMap() {
  Map<Item, Integer> map = Maps.newLinkedHashMap();
  addFuel(map, Items.LAVA_BUCKET, 20000);
  addFuel(map, Blocks.COAL_BLOCK, 16000);
  addFuel(map, Items.BLAZE_ROD, 2400);
  //...etc
  return map;
}

protected int getFuelTime(ItemStack stack) {
   if (stack.isEmpty()) {
      return 0;
   }

   return createFuelTimeMap().getOrDefault(stack.getItem(), 0);
}

public static boolean canUseAsFuel(ItemStack stack) {
   return createFuelTimeMap().containsKey(stack.getItem());
}