both or neither throw

bothorneitherthrow.java

final IsEqual<Throwable> makeBothOrNeitherThrow = new IsEqual<Throwable>() {
  @Override
  public boolean apply(final Throwable control, final Throwable experiment) {
    final boolean result = ((control == null) == (experiment == null));
    if (!result) {
       /// log relevant info to Kafka
    }
    return result;
  }
};