recalculateEnablement();
FileSystemFileSet fileSet = new FileSystemFileSet();
if (compareOption.isSelected()) {
fileSet.addFile(getFileForField(fileA));
fileSet.addFile(getFileForField(fileB));
boolean shouldCountIdentical = countIdentical.isEnabled()
&& countIdentical.isSelected();
engine.setSkipIdenticalFiles(shouldCountIdentical == false);
} else {
fileSet.addFile(getFileForField(fileA));