gistfile1.java

public void close() {
        try {
            Connection connection = ConnectionsAccess.getConnection(dbName);
            if(connection == null){
                throw new DBException("cannot close connection '" + dbName + "' because it is not available");
            }
            StatementCache.instance().cleanStatementCache(connection);
            connection.close();
            LogFilter.log(logger, "Closed connection: " + connection);
        } catch (Exception e) {
            logger.warn("Could not close connection! MUST INVESTIGATE POTENTIAL CONNECTION LEAK!", e);
        }finally{
            ConnectionsAccess.detach(dbName);// lets free the thread from connection
        }
    }