public void addSuperclassLink(XClassType subclass, XClassType superclass) {
public void addSuperclassLink(XClassType subclass, XClassType superclass) throws UnknownTypeException {
	public void addSuperclassLink(XClassType subclass, XClassType superclass) {		inheritanceGraph.createEdge(subclass, superclass, InheritanceGraphEdgeTypes.CLASS_EDGE);	}