вот что я пока написал только для одного класса:

1) интерфейс

public interface NumberInterface {
public NumberInterface EMPTY();
public NumberInterface UNBOUND();
public NumberInterface BOOLEAN_INTERVAL();
public NumberInterface ZERO();
public NumberInterface ONE();

public boolean intersects(NumberInterface other);
public Number getLow();
public Number getHigh();
public boolean isGreaterThan(NumberInterface other);
public boolean isGreaterOrEqualThan(NumberInterface other);
public NumberInterface plus(NumberInterface interval);
public NumberInterface minus(NumberInterface other);
public NumberInterface times(NumberInterface other);
public NumberInterface divide(NumberInterface other);
public NumberInterface shiftLeft(NumberInterface offset);
public NumberInterface shiftRight(NumberInterface offset);
public NumberInterface modulo(NumberInterface other);
public boolean isUnbound();
public NumberInterface union(NumberInterface other) ;
public boolean contains(NumberInterface other);
public boolean isEmpty();
public NumberInterface negate();
// public NumberInterface createUpperBoundedInterval(Long upperBound);
// public NumberInterface createLowerBoundedInterval(Long lowerBound);
public NumberInterface intersect(NumberInterface other);
public NumberInterface limitUpperBoundBy(NumberInterface other);
public NumberInterface limitLowerBoundBy(NumberInterface other);
}