AbstractGame for HiLo mocking

package hilomocked;

import java.util.Observable;

/**
 * AbstractGame is a base class for all HiLo Games.
 *
 * @author jdalbey
 */
public abstract class AbstractGame extends Observable
{

    public enum Guess
    {

        low, high
    };

    public AbstractGame()
    {
    }

    /**
     * Accessor to how much money the user has.
     */
    public abstract int getBalance();

    /**
     * Accessor to the current number.
     */
    public abstract int getCurrentNum();

    /**
     * Take a turn
     *
     * @param guess The user's guess if the next number is higher or lower than
     * current.
     * @post outcome is computed and bankroll updated, a new currentNum is
     * selected randomly.
     */
    public abstract void takeTurn(Guess guess);
}