public static void someMethod1() {
        // ...
        if (problem) {
            throw new Exception("Usefull Message.");
        }
        // ...
    }

    public static void someMethod2() {
        // ...
        if (problem) {
            Exception("Usefull Message.");
        }
        // ...
    }

    public static void someMethod3() throws Exception {
        // ...
        if (problem) {
            throw (new Exception("Usefull Message."));
        }
        // ...
    }

    public static void someMethod4() throws Exception {
        // ...
        if (problem) {
            throw new Exception("Usefull Message.");
        }
        // ...
    }