Don't wrap runtime exceptions with another RuntimeException

[longtimeago]

We've found the lib very useful, thanks for it!
Unfortunately, there is one thing which prevents it to be used with org.springframework.web.bind.annotation.ControllerAdvice exception handling contrroller from spring-mvc
Every time the lib catchers exception it wraps the exception with RuntimeException.

Would it be better to wrap only checked exceptions and propagate unckecked as they are?

[longtimeago]

/cc @jasongoodwin