Exploding Fluid/Gas

package mod.mcreator;

import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;

import net.minecraft.world.World;
import net.minecraft.util.math.BlockPos;
import net.minecraft.item.ItemStack;
import net.minecraft.init.Blocks;

import java.util.Random;
import java.util.HashMap;

public class mcreator_mycoaldustexplode {

	public static void executeProcedure(java.util.HashMap<String, Object> dependencies) {
		if (dependencies.get("x") == null) {
			System.err.println("Failed to load dependency x for procedure mycoaldustexplode!");
			return;
		}
		if (dependencies.get("y") == null) {
			System.err.println("Failed to load dependency y for procedure mycoaldustexplode!");
			return;
		}
		if (dependencies.get("z") == null) {
			System.err.println("Failed to load dependency z for procedure mycoaldustexplode!");
			return;
		}
		if (dependencies.get("world") == null) {
			System.err.println("Failed to load dependency world for procedure mycoaldustexplode!");
			return;
		}
		int x = (int) dependencies.get("x");
		int y = (int) dependencies.get("y");
		int z = (int) dependencies.get("z");
		World world = (World) dependencies.get("world");
		if (((world.getBlockState(new BlockPos((int) x, (int) y, (int) z))).getBlock() == Blocks.BOOKSHELF.getDefaultState().getBlock())) {
			world.createExplosion(null, (int) x, (int) y, (int) z, (float) 4, true);
		}
	}

	public static Object instance;

	public void load(FMLInitializationEvent event) {
	}

	public void generateNether(World world, Random random, int chunkX, int chunkZ) {
	}

	public void generateSurface(World world, Random random, int chunkX, int chunkZ) {
	}

	public void serverLoad(FMLServerStartingEvent event) {
	}

	public void preInit(FMLPreInitializationEvent event) {
	}

	public void registerRenderers() {
	}

	public int addFuel(ItemStack fuel) {
		return 0;
	}
}

Any ideas? This line sounds bad:

System.err.println("Failed to load dependency x for procedure mycoaldustexplode!");