code: function(dbFilename) {
      this.base(arguments);
  
      this.__dbFilename = dbFilename || "db.json";
      this.__libraries = [];
      this.__librariesByNamespace = {};
      this.__initialClassesToScan = new qx.tool.compiler.utils.IndexedArray();
      this.__locales = ["en"];
      this.__cldrs = {};
      this.__translations = {};
      this.__classFiles = {};
      this.__environmentChecks = {};
    }
docs: Constructor
  
  @param dbFilename
  {String} the name of the database, defaults to "db.json"