You need to specify the Main-Class, in order that it write into the META-INF/MANIFEST.MF

    Manifest-Version: 1.0
    Build-Jdk: 1.7.0_40
    Built-By: bryanhunt
    Created-By: Apache Maven 3.1.1
    Main-Class: com.picsolve.media.MMSMain
    Archiver-Version: Plexus Archiver