[1.8] Generating a New Village Structure

I have little to no knowledge of world generation (besides basic ore generation), and making a new village home seemed like a good place to start.

This is what I have so far

VillageHandler:

package enlistment.village;

import java.util.ArrayList;
import java.util.Random;

import net.minecraft.world.gen.structure.StructureVillagePieces;
import net.minecraftforge.fml.common.registry.VillagerRegistry;

public class VillageHandler {
public static void init() {
	ArrayList<StructureVillagePieces.PieceWeight> pieces = new ArrayList<StructureVillagePieces.PieceWeight>();

	pieces.add(new StructureVillagePieces.PieceWeight(VillageTroopHome.class, 100, 100));

	VillagerRegistry.addExtraVillageComponents(pieces, new Random(), 100);
}
}

VIllageTroopHome:

package enlistment.village;

import java.util.Random;

import net.minecraft.init.Blocks;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;
import net.minecraft.world.gen.structure.StructureBoundingBox;
import net.minecraft.world.gen.structure.StructureVillagePieces;

public class VillageTroopHome extends StructureVillagePieces.Village {
public VillageTroopHome(StructureVillagePieces.Start start, int type, Random random, StructureBoundingBox bb, EnumFacing direction) {
	super(start, type);

	this.coordBaseMode = direction;
	this.boundingBox = bb;
}

@Override
public boolean addComponentParts(World world, Random random, StructureBoundingBox bb) {
	System.out.println("HI");

	if(this.field_143015_k < 0) {
		this.field_143015_k = this.getAverageGroundLevel(world, bb);

		if(this.field_143015_k < 0) {
			return true;
		}

		this.boundingBox.offset(0, this.field_143015_k - this.boundingBox.maxY + 12 - 1, 0);
	}

	this.fillWithBlocks(world, bb, 1, 1, 1, 3, 3, 3, Blocks.cobblestone.getDefaultState(), Blocks.cobblestone.getDefaultState(), false);
	this.fillWithBlocks(world, bb, 2, 2, 2, 2, 100, 2, Blocks.glass.getDefaultState(), Blocks.glass.getDefaultState(), false);

	this.spawnVillagers(world, bb, 2, 1, 2, 1);

	return true;
}
}

Looking through the source code of Minecraft, I haven't been able to decipher what the cryptic integers in the VIllagerRegistry#addExtraVillageComponents method does, so I set them to 100 for testing purposes. Also I set the integers in the StructureVillagePieces#PieceWeight constructor to 100 for the same reason.

The questions I have besides the integers are if I'm using the correct methods, extending the right classes, and passing the right objects.