Hi
Capella supports OSLC, according to Publication for Capella - Obeo.
From the videos on that page, I can see that they have an integration with Siemens Polarion (which also supports OSLC). Worth getting an evaluation license for that? It is easier to start with an integration that one knows works/exists.
As far as I know (but I can be wrong), there is no current oslc interface for Confluence. But maybe you can build that as part of your thesis 
For an introduction to OSLC, have a look at the
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OSLC-primer https://archive.open-services.net/resources/tutorials/oslc-primer
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You can find tutorials and more resources under Get started with developing OSLC applications (particularly tutorial on developing an OSLC interface for Bugzilla, using Eclipse Lyo, etc.)
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Some general items Resources | OSLC
And if you want to know which other tools provide OSLC support, you can view a survey from 2020 A survey of commercial tools with OSLC support | OSLC. But things have changed since then.