Class for DbConnection handiling

DbConnection.java

package Base.db_connection;

import org.json.JSONObject;

import java.sql.*;

import static Base.TestPropertiesLoader.getDbConnectionDetails;

public class DbConnection {
    public Connection con = null;
    public Statement statement= null;
    JSONObject connnDetails;

    public DbConnection(String dbName) {
        try {
            connnDetails = getDbConnectionDetails(dbName);
            Class.forName(connnDetails.getString("driver"));
            con = DriverManager.getConnection(connnDetails.getString("dbname"),
                                              connnDetails.getString("username"),
                                              connnDetails.getString("password"));
            statement= con.createStatement();
            System.out.println ("Database connection established");
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        }

    }

    public ResultSet query(String query){
        System.out.println("capturing from database " +query);
        ResultSet result = null;
        try {
            result = statement.executeQuery(query);
        } catch (SQLException e) {
            System.out.println("Error during query execution + " +e.getMessage());
            e.printStackTrace();
        }
        if (result == null){
            throw new NullPointerException("Query resulted in null. Check DB connection and query itself");
        } else {
            return result;
        }
    }

    public void terminateConnection(){
        try {
            con.close();
        } catch (SQLException e) {
            System.out.println("Couldn't terminate connection or some other error appeared "+e.getMessage());
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }

}