> But I am wondering. If I open Connection using DriverManager in
> some method and I do not explicitly close this connection, when
> method is over and connection instance is not in scope, will
> GarbageCollector close it or it will remain open.

Specification requires this and
org.firebirdsql.jdbc.AbstractConnection.finalize() will close the
connection. But when this happen knows only garbage collector. :)

Roman