Mariadb doesn't starts. Control process Exited

I am trying to start mariadb with systemctl start mariadb also using sudo along.

This is what it says

Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.

I saw this at many places but nothing helped.

It fails, I removed, installed again, nothing happened.

This is a part of /var/log/messages

Jun 17 18:03:09 controller systemd: Starting MariaDB 10.1 database server... Jun 17 18:03:09 controller mysqld: 2016-06-17 18:03:09 140477178509440 [Note] /usr/libexec/mysqld (mysqld 10.1.12-MariaDB) starting as process 120408 ... Jun 17 18:03:12 controller systemd: mariadb.service: main process exited, code=exited, status=1/FAILURE Jun 17 18:04:13 controller systemd: mariadb.service: control process exited, code=exited status=3 Jun 17 18:04:13 controller systemd: Failed to start MariaDB 10.1 database server. Jun 17 18:04:13 controller systemd: Unit mariadb.service entered failed state. Jun 17 18:04:13 controller systemd: mariadb.service failed.

I am really new to CentOS and maridb, so I don't know how to proceed.