If you want to create a generic exception message for all exceptions, we can add a method to RestResponseEntityExceptionHandler with the @ExceptionHandler(Exception.class) annotation.

The following code snippet shows how we can do this:

@ExceptionHandler(Exception.class)
public final ResponseEntity<ExceptionResponse> todoNotFound(Exception ex) {
       //Customize and return the response
}

Any exception for which a custom exception handler is not defined will be handled by the previous method.