I've made a new biome trying to make a mod about exploration. But i don't know if i'm just unlucky and never found my biome, or it,s just not appearing. 
  
Here's my code for the Biome: 
 
package com.dalibe.study.biome;
import net.minecraft.world.biome.BiomeGenBase;
public class DarkyBiomeClass extends BiomeGenBase {
public DarkyBiomeClass(int id) {
	super(id);
	this.heightVariation = 2F;
	this.rootHeight = 2F;
	this.waterColorMultiplier = 0xffffff;
	this.temperature = 0.5F;
	this.enableRain = true;
	System.out.println("Darky Biome found");
}
}
 
  
Here's my declaration of the Biome : 
 
public static BiomeGenBase DarkyBiome = new DarkyBiomeClass(150).setBiomeName("DarkyBiome").setColor(0x223263);
 
  
And here's the code to add it to the game: 
 
BiomeManager.addSpawnBiome(DarkyBiome);
 
  
I've put in the biome class a System.out.printIn(); to be sure that the class is detected and it is, the message appears in the console. 
  
So, have i miss a step some where and is there a way to isolate the biome, a way to create a world with a chosen list of biome so i can test them individualy?