currently, XMLReader.close() explicitly does not close the underlying Input Stream. there should be a method that completly cleans up the environment, including closing any open streams.
this RFE came up do to an AppServer use case:
 - AppServer applications use the JAX-WS runtime
 - a WSDL is parsed to bring up the web service
 - the stream was left open after app was deployed
 - AppServer later tries to close all files and cannot