} else if (arg.equals("-files")) {
files = true;
} else if (arg.equals("-graph")) {
graph = true;
} else if (arg.equals("-excljava")) {
cdpb.excludePlatformClasses(true);
} else if (arg.startsWith("-")) {
throw new IllegalArgumentException("Bad option: " + arg);
} else {
rootClasses.add(arg);
}