package droplauncher.exception;

public class InvalidBotTypeException extends Exception {

  public InvalidBotTypeException() {
    super();
  }

}

package droplauncher.exception;

public class InvalidBotTypeException extends Exception {

  public InvalidBotTypeException() {
    super();
  }

  public InvalidBotTypeException(String message) {
    super(message);
  }

}

Update InvalidBotTypeException.java