Do not create project files if there were problems during project generation

python/python-community-configure/src/com/jetbrains/python/newProject/steps/PythonGenerateProjectCallback.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2016 JetBrains s.r.o.
+ * Copyright 2000-2017 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,6 +68,7 @@ public class PythonGenerateProjectCallback implements NullableConsumer<ProjectSe
         final boolean result = beforeProjectGenerated.fun((PythonProjectGenerator)generator);
         if (!result) {
           Messages.showWarningDialog("Project can not be generated", "Error in Project Generation");
+          return;
         }
       }
     }