/**
  * Import hrm and gpx
  * @param string $filename relative path
  */
 private function importHRMandGPX($filename)
 {
     $HRMImporter = new ImporterFiletypeHRM();
     $HRMImporter->parseFile($filename . '.hrm');
     $GPXImporter = new ImporterFiletypeGPX();
     $GPXImporter->parseFile($filename . '.gpx');
     $Importer = new ImporterHRMandGPX($HRMImporter, $GPXImporter);
     $this->TrainingObjects[] = $Importer->object();
     $this->addErrors($HRMImporter->getErrors());
     $this->addErrors($GPXImporter->getErrors());
     unlink(FRONTEND_PATH . $filename . '.hrm');
     unlink(FRONTEND_PATH . $filename . '.gpx');
 }