private void generateGroove(DefaultMutableTreeNode rootInit, DefaultGraph graph, DefaultNode parentB) {
		DefaultFactory factory = graph.getFactory();

		DefaultLabel aLabel = factory.createLabel("type:A");
		DefaultLabel bLabel = factory.createLabel("type:B");
		DefaultLabel xLabel = factory.createLabel("x");
		DefaultLabel yLabel = factory.createLabel("y");

		DefaultNode aNode = factory.createNode();
		graph.addNode(aNode);
		graph.addEdge(aNode, aLabel, aNode);

		if (parentB != null)
		{
			graph.addEdge(parentB, yLabel, aNode);
		}

		for (int b = 0; b < maxLevelA; b++) {

			DefaultNode bNode = factory.createNode();
			graph.addNode(bNode);
			graph.addEdge(bNode, bLabel, bNode);

			graph.addEdge(aNode, xLabel, bNode);

			if (rootInit.getChildCount() > b)
			{
				DefaultMutableTreeNode child = (DefaultMutableTreeNode) rootInit.getChildAt(b);
				generateGroove(child, graph, bNode);
			}
		}

		Enumeration<DefaultMutableTreeNode> nodes = rootInit.children();
		while (nodes.hasMoreElements())
		{
			DefaultMutableTreeNode node = nodes.nextElement();

			generateGroove(node, graph, aNode);
		}
	}

		DefaultGraph startGraph = new DefaultGraph("startgraph");
		generator.generateGroove(rootInit, startGraph, null);

		System.out.println(startGraph.toString());