Steps

* Open Java specific code completion
* Click on Add button
* Enter 'java.io.' and press OK
* Apply chanded settings
* In editor type 'java.' and call code completion
* Delete text from previous step, type 'File f' and call fix imports

Expected result:

* The 'java.io' is added into exclude table. The code completion provide all packages java.* except java.io. Fix import does nothing since it does not know any class named File.

Actual result:

* When fixing imports an import for java.io.File is added to the class.