Could finish wsdl2rest wizard though wsdl file is not valid

There is still enabled a '' Finish '' button though wdsl file is not valid and after trying to finish the wizard there is shown an error prompt.

After path selection for the wsdl file there is immediately shown validation error in Error Log view so there shouldn't been enabled 'Finish' button until wsdl file is valid.

For example for empty file:

WSDLException: faultCode=PARSER_ERROR: Problem parsing 'file:/home/djelinek/workspace/wsdl/src/main/data/NewWSDLFile.wsdl'.: org.xml.sax.SAXParseException: Premature end of file.