Dear Cosmin
I would say Hedychridium monochroum Buysson, 1888
even if it has a different colour from the typical W-European one.
In your Country there should be other 2 similar species:
Hedychridium zelleri (Dahlbom)
and Hedychridium adventicium Zimmermann,
both are very rare.
At least the first one is present in central Europe from Germany to Ukraine, the second one is more rare and it's distribution in not yet well known, even if it is present in central Europe too.
Ciao
Paolo