Would you like to [add more error handling](https://github.com/ruben2020/codequery/blob/f5645c59031504d7a9c7db3c5fcb89d77129831d/makedb/csdbparser.cpp#L245 "Update candidate: csdbparser::open_file()") for return values from a function like “[fopen](http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html "Open a stream")”?
