diff --git a/parser/common/pre_checker.cc b/parser/common/pre_checker.cc
index af3ac52..e401ab2 100644
--- a/parser/common/pre_checker.cc
+++ b/parser/common/pre_checker.cc
@@ -208,6 +208,7 @@ Status PreChecker::Save(const string &file) {
     }
   }
 
+
   // Initialization model related JSON information
   nlohmann::json model;
   model[kKeyName] = model_name_;