new java project creates invalid mvc group

application {
    title = 'GriffonOnJava'
    startupGroups = ['griffonOnJava']

    // Should Griffon exit when no Griffon created frames are showing?
    autoShutdown = true

    // If you want some non-standard application class, apply it here
    //frameClass = 'javax.swing.JFrame'
}
mvcGroups {
    // MVC Group for "griffon-on-java"
    'griffon-on-java' {
        model      = 'griffon.on.java.GriffonOnJavaModel'
        view       = 'griffon.on.java.GriffonOnJavaView'
        controller = 'griffon.on.java.GriffonOnJavaController'
    }

}