try {
loader.loadClass(info.getPlugInClass()) ;
Class<?> plugInClass = Class.forName(info.getPlugInClass(), true, loader) ;
Class<? extends PlugIn> plClass = plugInClass.asSubclass(PlugIn.class) ;
Constructor<? extends PlugIn> constructor = plClass.getConstructor() ;
PlugIn plugIn = constructor.newInstance() ;
plugIn.copyPicture(this.ressourceFolder) ;
} catch (Exception e) {
/*=== Possible exceptions ===
* - ClassNotFoundException
* - IllegalAccessException
* - IllegalArgumentException