Now its time to test the docs!
$ php configure.php
If everything worked out OK you should see a message saying All good. Saving .manual.xml... done.". If you however got Eyh man. No worries. Happ shittens. Try again after fixing the errors above. then check the error messages above and try fixing the errors and try again :)
Now its time to build the docs:
$ phd -d .manual.xml -t chunkedhtml
Now, poke around the output/php-xhtml/ directory and locate the new exception you just documented output/php-xhtml/class.<exceptionname>.