why Source#validate() is not declared to throw any exception

[Ted Yu]

Hi,
I was reading HDFSFileSource.java where:

  @Override
  public void validate() {
...
      } catch (IOException | InterruptedException e) {
        throw new RuntimeException(e);
      }

Why is validate() not declared to throw any exception ?
If validation doesn't pass, there is nothing to clean up ?

Thanks