Maven knime-core with knime-cloud

Hi,

my main goal is to create own extension that is very similar to AWS Authentication node, because I dont want to login to AWS cloud but to my S3 storage (openIO). I setup the development ide and I have no problem to create my own extension without any inheritance. The problem occurs with inheritance. I have to download two projects knime-core and knime-cloude. In the knime-sdk setup repository on github I found this part

My errors in the Eclipse are

. Any proposed solution will be helpful.