Creating a manifest for a jar file

I wrote a java program to perform pre-commit processing for subversion. I had originally written it with a static main. I removed the static definition from the main class. I can't seem to find a way to declare the manifest. What I currently have is:

src/process_checkin/manifest.mf contains:

Manifest-Version: 1.0
Bundle-ClassPath: process_checkin.processCheckin.jar

The jar section of the build is:

<jar jarfile="${dist}/processCheckin.jar"
        basedir="${classes}"
        manifest="${basedir}/src/process_checkin/manifest.mf"
    />

Thank you,
Chuck Holzwarth