Why??

package com.dkproduction;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import com.wowza.wms.logging.WMSLogger;
import com.wowza.wms.logging.WMSLoggerFactory;

public class DBClass {
    private static Connection conn;
    private static final String connString = "jdbc:mysql://localhost:3306/tokentest?user=root";
    private static WMSLogger log;

    public DBClass() {
        log = WMSLoggerFactory.getLogger(null);
        log.info("DatabaseClass Awakened!");
    }

    // Så snart jeg kalder den her metode fra ModuleMain klassen, så får jeg en Reflection Exception!
    public static Token getTokenByUsername(String username) {
        conn = null;
        Token token = null;
        String tokenText = "", timestamp = "", tokenExpire = "", oldToken = "", oldTokenTimeStamp = "",
                oldTokenExpire = "", banned = "";
        try {
            conn = DriverManager.getConnection(connString);
            String query = "SELECT * FROM token WHERE username='" + username + "'";
            PreparedStatement prepState = null;
            ResultSet rs = null;
            try {
                prepState = conn.prepareStatement(query);
                rs = prepState.executeQuery();
                while (rs.next()) {
                    tokenText = rs.getString("token_text");
                    timestamp = rs.getString("time_stamp");
                    tokenExpire = rs.getString("token_expire");
                    oldToken = rs.getString("old_token_text");
                    oldTokenTimeStamp = rs.getString("old_token_time_stamp");
                    oldTokenExpire = rs.getString("old_token_expire");
                    banned = rs.getString("banned");
                }
                rs.close();
                token = new Token(username, tokenText, timestamp, tokenExpire, oldToken, oldTokenTimeStamp,
                        oldTokenExpire, banned);
                return token;
            } catch (Exception e) {
                System.out.println(e.getMessage());
                return null;
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
            return null;
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (Exception e) {
                    // Do error handling here
                    System.out.println("Closing Connection Error\n" + e.getMessage());
                }
            }
        }
    }
}