import net.minecraft.server.MinecraftServer;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;</BUG>
import net.minecraft.world.WorldServer;
<BUG>import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;</BUG>
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.gen.NoiseGeneratorOctaves;
import net.minecraft.world.gen.layer.GenLayer;
import org.apache.commons.io.FileUtils;

import net.minecraft.server.MinecraftServer;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ReportedException;
import net.minecraft.world.World;
import net.minecraft.world.WorldServer;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeCache;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.gen.NoiseGeneratorOctaves;
import net.minecraft.world.gen.layer.GenLayer;
import org.apache.commons.io.FileUtils;
