|Belgium topped Montenegro to crwon themselves Champions of Division B in Bucharest|
Both sides had already clinched promotion by reaching the Final in Bucharest and the country that joined them in next season's Division A was Sweden, who blew out Hungary 79-55 earlier in the day in the battle for third place.
Ludvig Hakanson had 23 points and 11 assists for the Swedes, who raced into a 29-16 lead by end of the first quarter and never turned back.
Belgium had only scraped a 50-48 triumph over Hungary to earn a place in the title game but they were more convincing against Montenegro in winning 56-46.
The basket by Demirtas was his last and it took him to 15 points in the game.
He also had six steals.
Rayan Kayembe-Milongo led Belgium with 19 points on seven of 14 shooting.
Belgium only had a 44-41 advantage after a shot by Zoran Nikolic for Montenegro.
Kayembe-Milongo answered with a three-ball and a lay-up to stretch the Belgium lead to eight and they held on.
Bosnia and Herzegovina beat Israel to fifth place after outscoring them 22-11 in the fourth quarter of a 71-65 victory.
The Netherlands prevailed 71-63 over Belarus to finish ninth.
Yannick Franke poured in 26 points for the Dutch.
Finland routed Georgia, 89-48, to come in 11th and Denmark won convincingly over Romania, 91-67, to end up 13th.