private void createDirectoryIfNotYetExists(final File directory) {
diffFiles.assertRootDirectoryExists();
if (!directory.exists()) {
directory.mkdirs();
}
}
private void createComparisonDirectoryIfNotYetExists() {
createDirectoryIfNotYetExists(
diffFiles.getComparisonDirectory(baseBranchName, baseBuildName, comparisonName));
}