package cs601.graph;

public class UnweightedGraph<ID extends Comparable, N extends Node<ID>>
    implements Graph<ID,N>
{
}

package cs601.graph;

public class UnweightedGraph<ID extends Comparable, N extends Node<ID>>
    implements Graph<ID,N>
{
	public N addNode(N node) { return null; }
}

add first blank impl