You can set a default logging configuration in the logging.config file. When the Logger framework is unable to find a matching name or a parent configuration1 for a configuration specified in the LoggerBuilder:GetLogger() method, it uses the default logging configuration to process log events. Use the DEFAULT_LOGGER property to specify a default logging configuration as shown in this example:
{
  "DEFAULT_LOGGER": "my.ABL.class.1",
  "logger": {
      "my.ABL.class.1": {
          "logLevel": "INFO",
          "filters": [
             "FULL_TEXT_FORMAT",
             {
               "name": "NAMED_FILE_WRITER",
               "fileName": "Class1.log",
               "appendTo": true
             }
          ]
      },
      "my.ABL.class.2": {...},
      "my.ABL.class.3": {...}
  }
}
1 You can set up a logger hierarchy based on dotted strings. See Set up a logger hierarchy