Don't exit from main() when it's not necessary

[ghost]

This change would help calling Pride from another JVM application

[lptr]

This only works when Pride is successful. I'd recommend something like this:

[lptr]

public static void main(String... args) {
    System.exit(execute(args));
}

public static int execute(String... args) {
    // ...
    return exitValue;
}

[lptr]

This way you can call PrideCli.execute() instead of main(), and you always get back a proper exit value.