I fixed it. Here is how:
sudo nano /etc/apt/sources.list.d/ee-repo.list
you will see the folowing text:
deb http://mirror.aarnet.edu.au/pub/MariaDB/repo/10.0/ubuntu trusty main
deb http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_14.04/ /
uncomment the mariadb deb repository and add a working one instead. The content of that file should be changed like this:
# deb http://mirror.aarnet.edu.au/pub/MariaDB/repo/10.0/ubuntu trusty main
deb http://mirror.23media.de/mariadb/repo/10.0/ubuntu trusty main
deb http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_14.04/ /`
The repository used in above example is a working official german mirror. You can ofcourse use a mirror that is located near you. Find your mirror from this site:
https://downloads.mariadb.org/mariadb/repositories/#mirror=23Media&distro=Ubuntu&distro_release=trusty--ubuntu_trusty&version=10.0
And copy/paste the deb respository info shown in the boxes below.
Hope this helps someone!