I thought about installing the Apache Derby plugin to my eclipse.
On https://db.apache.org/derby/integrate/derby_plugin.html I found:
Download the Derby core plug-in zip from the Apache Derby site: http://db.apache.org/derby/derby_downloads.html. The plug-in is available for download from each Derby release download page.
The current release is Apache Derby 10.11.1.1 but the plugin is only available on the download-page of the release Apache Derby 10.8.2.2.
Did the development of the eclipse-plugin stop and/or is there an alternative?