Review

class ExceptionUtils {
    /**
     * Gets a short message summarising the root cause exception.
     * <p>
     * The message returned is of the form
     * {ClassNameWithoutPackage}: {ThrowableMessage}
     *
     * @param th  the throwable to get a message for, null returns empty string
     * @return the message, non-null
     * @since Commons Lang 2.2
     */
    public static String getRootCauseMessage(Throwable th) {
        Throwable root = ExceptionUtils.getRootCause(th);
        root = (root == null ? th : root);
        return getMessage(root);
    }

}