InterruptExtention and Exception handled incorrectly

[JLLeitschuh]

Having:

catch (Exception e) {
   // Nothing here
}

Will squash the interrupted flag meaning that the plugin can hang the plugin forever.

Similarly:

catch (InterruptedException e) {
    // We only do logging here.
   LOGGER.log("Blah", e);
}

has the same problem.

There are various places where this code exists and should be cleaned up.

http://www.yegor256.com/2015/10/20/interrupted-exception.html