Donika played professional hockey in Russia for Torpedo Yaroslavl of the Russian Superleague starting in 1997.
As well as Torpedo Yaroslavl, Donika played in the RSL for Dynamo Moscow, Amur Khabarovsk, Spartak Moscow, Molot-Prikamye Perm, HC Sibir Novosibirsk, Torpedo Nizhny Novgorod and Lada Togliatti.
In 1998, Russia lost to Finland in overtime during the gold medal game, settling for silver.
At the tournament in Winnipeg, Manitoba, Donika and his Russian teammates captured the gold medal by defeating Canada in overtime.
With the victory, Donika and his teammate Roman Lyashenko became the only two players in the history of the World Junior Championships to capture gold, silver and bronze medals.