Map<String, Map<String, String>> getData(Map<String, String> params) {
    StringBuilder query = new StringBuilder(); // Construct query using it
    ResultSet rs = null;
    try {
        rs = DataUtil.getData(query);
        while(rs.next) {
            // store data in return Map
        }
    } catch(ConnectionException ce){
        ce.printStackTrace();
    } catch(Exception e) {
        e.printStackTrace();
    } finally {
        rs = null;
        query = null;
    }
}