Check that QIODevice::open() is successful, and explicitly call close()

src/main.cpp

@@ -222,7 +222,9 @@ int main(int argc, char *argv[]) {
     // Create the file if it doesn't exist already
     if (!QFile::exists(s.fileName())) {
       QFile file(s.fileName());
-      file.open(QIODevice::WriteOnly);
+      if (file.open(QIODevice::WriteOnly)) {
+        file.close();
+      }
     }
 
     // Set -rw-------