I got another issue , after further debug it seems , we are expecting a paragraph for everything means all tags must be inside ><w:p> tag.
In the below word xml I have </w:p><w:bookmarkEnd w:id="0"/><w:p. hence it is looking for paraid and failing.
the exception I am getting is
javax.xml.stream.XMLStreamException: ParseError at :
Message:
http://www.w3.org/TR/1999/REC-xml-names ... paraId&w14 at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(Unknown Source)
at org.docx4j.diff.Differencer.combineAdjacent(Differencer.java:1229)
at org.docx4j.diff.Differencer.diffWorker(Differencer.java:412)
at org.docx4j.diff.Differencer.diff(Differencer.java:302)
at org.docx4j.samples.CompareDocuments.main(CompareDocuments.java:109)
this ...