Thanks for contributing. Sadly I had to revert your changeset for a couple of reasons:

1) Usage of Google Maps data for OSM is stricly forbidden
2) The name cannot be verified. There are no official or even unofficial sources mentioning "Eulenpark" that I could find. If you can find those please let me know. "Eulenpark" is just a name that popped up on Google Maps some weeks ago which makes it very easy to detect that this edit uses Google Maps data, even if it didn't have explicity listed in the changeset source.
3) The only name this park might have is "Stadtpark" based on the name "Neuer Stadtpark" being found in documents about the Eichplatz Areal construction project. This isn't a name I've heared anybody use in real life though, as a patch of greenery next to a giant parking lot not really "earning" the city park status.

As much as I would like a name to be found for this park, without sources or people starting to adopt a name for this park in real life, "Eulenpark" and "Stadtpark" is both at this time probably incorrect.