Write manifest files
        :param files_list: list
        :return:

def _set_manifest_data(self, files_list):
        """
        Write manifest files
        :param files_list: list
        :return:
        """
        if files_list:
            data = ",".join(files_list)
            self.s3.put_object(Bucket=self.sitename,
                               Key=self.manifest_file,
                               Body=data,
                               ACL='private')