I have a problem, that maven is looking for resources inside of Eclipse installation folder.
It is saying:
This file was not found: file:/C:/eclipse/
Got it... Finally.. I don't know why, but Eclipse just does not refresh its own settings from Mavens.
I had to change .classpath:
In the fourth line, there excluding="**" - I removed this, and it worked.
After this, I also had problems with name of the project. In pom.xml was
core-maven
core-maven
and in build tag which I wanted to change in just "core", but it did not work, until I found it and replace in files under .settings folder.