TextNodeHistorian is a subclass of Historian which has been optimized
for working with the TextBuffer storage of a TextNode while taking into
account the expected save encoding.
public void recordContents(java.net.URL srcUrl,
java.net.URL dstUrl)
throws java.lang.Exception
Persist the current contents of the Node located at the given source
URL into the given destination URL.
This implementation passes an OutputStreamWriter opened upon the
destination URL to the write method of the TextNode's TextBuffer.