The bundle, as it stands, has a number of packages that are exported in the manifest.
For example, org.apache.derby.jdbc is exported. That means that I can reference any classes in this package in an OSGi environment. If only a subset of classes in that package should be exposed, there is syntax supported by OSGi to expose only specific classes (or the other classes should be moved out of the package). When I reference any of those classes, all of the packages for which there is an import statement must also be exported. Otherwise, a ClassNotFound will occur at runtime. It's not worth adding any OSGi information to the manifest if the jar is not usable as an OSGi bundle.
The two packages that I referenced in the original description were packages that I needed to add to the manifest exports when running a program in an OSGi environment that covers most if not all of the JDBC interface.
However, looking at imports from org.apache.derby.jdbc, it would seem that the following are needed for all of the classes in org.apache.derby.jdbc:
Working with OSGi gives one a new vision on code isolation, modularity, etc.