// start the plugin class
System.out.println("Open jarfile");
Properties jprop = getJarProperties(jarFile);
String startClass = jprop.getProperty("pluginclass");
System.out.println("Start plugin");
Earth3dPlugin ep = (Earth3dPlugin) pcl.findClass(startClass).newInstance();
ep.setConfiguration(conf);
ep.setExtensionManager(extensionManager);
ep.init();
System.out.println("Started plugin");