private void deleteAll() {
        try {
            openChangesFile().delete();
        } catch (IOException e) {
            if(LOG.isError()) {
                LOG.error("FavoritePersistence.deleteAll()", e);
            }
        } catch (PermissionsException e) {
            if(LOG.isError()) {
                LOG.error("FavoritePersistence.deleteAll()", e);
            }
        }
        try {
            openListFile().delete();
        } catch (IOException e) {
            if(LOG.isError()) {
                LOG.error("FavoritePersistence.deleteAll()", e);
            }
        } catch (PermissionsException e) {
            if(LOG.isError()) {
                LOG.error("FavoritePersistence.deleteAll()", e);
            }
        }
    }