package innovimax.mixthem.operation;

/**
* <p>This is a enumeration of result type.</p>
* <p>Here are the types:</p>
* <ul>
* <li>HAS_RESULT: has a result</li>
* <li>READ_FIRST_FILE: read first file</li>
* <li>READ_SECOND_FILE: read second file</li>
* <li>READ_BOTH_FILES: read both files</li>
* </ul>
* @author Innovimax
* @version 1.0
*/
public enum ResultType {
    HAS_RESULT,
    READ_FIRST_FILE,
    READ_SECOND_FILE,
    READ_BOTH_FILES;
}

package innovimax.mixthem.operation;

/**
* <p>This is a enumeration of result type.</p>
* <p>Here are the types:</p>
* <ul>
* <li>HAS_RESULT: has a result</li>
* <li>PRESERVE_FIRST_LINE: don't read first file</li>
* <li>PRESERVE_SECOND_LINE: don't read second file</li>
* </ul>
* @author Innovimax
* @version 1.0
*/
public enum ResultType {
    HAS_RESULT,
    PRESERVE_FIRST_LINE,    
    PRESERVE_SECOND_LINE;
}

Update ResultType.java