JavaDoc at CombineArchive is misleading

## Trac Ticket #27
**component:** code
**owner:** martinP
**reporter:** martinP
**created:** 2016-09-24 15:34:37
**milestone:** 
**type:** task
**version:** 
**keywords:** 

Chris pointed out, that the text on the CombineArchive class constructor vs the text of the path parameter is misleading, in terms of creating vs. opening a CombineArchive.