I am on a phone connection at home, so downloading the jars to take a look
isn't a quick option, but I see one reference to:
so you might try:
One trick you can use with jars is to look at what classes it contains
jar tf *.jar
or look at one or all classes with:
jar xf *.jar
It's possible that the jar was re-organized after the article was written.
The opening use of the db variable: "XmlContainer db = null" doesn't make
sense but I guess it doesn't break anything to have it there.