in src/main/java/org/apache/maven/plugins/rar/RarMojo.java [465:473]
protected static File getRarFile(File basedir, String finalName, String classifier) {
if (classifier == null) {
classifier = "";
} else if (!classifier.trim().isEmpty() && !classifier.startsWith("-")) {
classifier = "-" + classifier;
}
return new File(basedir, finalName + classifier + ".rar");
}