IOException and FileVisitor

[Rémi Forax]

Hi Alan, hi all,
I don't understand why method visit* and postVisit of a FileVsitor 
doesn't propagate IOException ?
I've written a program one week ago that use a SimpleFileVisitor and I 
get only now an IOError
(visitFileFailed throws that error)
The current design is not very robust.

I prefer a crystal clear contract that explicitly say, well be prepared 
to catch some IO exception
while walking a file tree.

Rémi