message: Create base directory only (not full with file)
diff: @@ -62,7 +62,7 @@ export default class FileFlatDb implements BaseDb {
  this._fd = -1;
  this._file = path.join(base, file);
  - mkdirp.sync(this._file);
  + mkdirp.sync(base);
  }
  open (): void {
  