reworked initConnection (otherwise a closed connection could be

returned)

src/main/java/it/unibz/inf/isochrone/db/Database.java

@@ -653,10 +653,7 @@ public class Database {
 	}
 
 	protected void initConnection() {
-		if (connection == null) {
-			// lazy-loading of the database connection (so it is not created on object construction)
-			connection = ConfigIsochrone.getInstance().getConnection();
-		}
+		connection = ConfigIsochrone.getInstance().getConnection();
 	}
 
 	protected Connection getConnection() {