Constructor

@param dbFilename
{String} the name of the database, defaults to "db.json"
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 = {};
  }