I've alway struggled with packages, but think that I've finally figured it out.
On a Windows machine, the package name has to match up to a directory structure. So if you want to put things in a package called suncertify.db, that relates to a directory structure called suncertify\db. But to make all this work, Java has to know where suncertify is, and that is where the CLASSPATH variable comes in.
Assume I want to create the files in my suncertify.db package in a complete directory path called: