public class DataBaseUser {

    private QueryRunner queryRunner;

    public DataBaseUser(BasicDataSource basicDataSource) {
        this.queryRunner = new QueryRunner(basicDataSource);
    }

    ...
}

public class DataBaseAdmin {

    private QueryRunner queryRunner;

    public DataBaseAdmin(BasicDataSource basicDataSource) {
        this.queryRunner = new QueryRunner(basicDataSource);
    }

    ...
}

public class DataBaseChat {

    private QueryRunner queryRunner;

    public DataBaseChat(BasicDataSource basicDataSource) {
        this.queryRunner = new QueryRunner(basicDataSource);
    }

    ...
}

BasicDataSource basicDataSource = Core.getDataSource();

DataBaseAdmin dbAdmin = new DataBaseAdmin(basicDataSource);
DataBaseChat dbChat = new DataBaseChat(basicDataSource);

...

basicDataSource.getConnection().close();

public JSONObject userGetInfo(int userId) throws SQLException {
        return getQueryRunner().query(SqlCore.SQL_USER_INFO_GET, new ResultSetHandler<JSONObject>() {
            public JSONObject handle(ResultSet rs) throws SQLException {
                return DataSource.getDbSingleRow(rs);
            }
        }, userId);
    }