diff -r 4fa33bfa8fb9 -r 0f4f8f255c32 src/main/java/de/uapcore/lightpit/dao/postgres/PGModuleDao.java
--- a/src/main/java/de/uapcore/lightpit/dao/postgres/PGModuleDao.java	Sun May 10 10:11:10 2020 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,81 +0,0 @@
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 2018 Mike Becker. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *   1. Redistributions of source code must retain the above copyright
- *      notice, this list of conditions and the following disclaimer.
- *
- *   2. Redistributions in binary form must reproduce the above copyright
- *      notice, this list of conditions and the following disclaimer in the
- *      documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
-package de.uapcore.lightpit.dao.postgres;
-
-import de.uapcore.lightpit.LightPITModule;
-import de.uapcore.lightpit.dao.AbstractDao;
-import de.uapcore.lightpit.dao.ModuleDao;
-import de.uapcore.lightpit.entities.Module;
-
-import java.sql.Connection;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.util.Map;
-import java.util.Set;
-
-public final class PGModuleDao extends AbstractDao<Module> implements ModuleDao {
-
-    @Override
-    protected PreparedStatement listQuery(Connection connection) throws SQLException {
-        return connection.prepareStatement("select * from lpitcore_module");
-    }
-
-    @Override
-    protected Module mapColumns(ResultSet result) throws SQLException {
-        final var mod = new Module();
-        mod.setModID(result.getInt("modid"));
-        mod.setClassname(result.getString("classname"));
-        mod.setVisible(result.getBoolean("visible"));
-        mod.setPriority(result.getInt("priority"));
-        return mod;
-    }
-
-    @Override
-    public void syncRegisteredModuleClasses(Connection conn, Set<Map.Entry<String, LightPITModule>> moduleSet) throws SQLException {
-
-        var check = conn.prepareStatement("select visible from lpitcore_module where classname = ?");
-        var insert = conn.prepareStatement("insert into lpitcore_module (classname, visible, priority) values (?, ?, ?)");
-        insert.setBoolean(2, true);
-        // update/delete not required, we do this in the module management UI
-
-        for (Map.Entry<String, LightPITModule> modEntry : moduleSet) {
-            if (modEntry.getValue().systemModule()) continue;
-
-            check.setString(1, modEntry.getKey());
-            try (ResultSet r = check.executeQuery()) {
-                if (!r.next()) {
-                    insert.setString(1, modEntry.getKey());
-                    insert.setInt(3, modEntry.getValue().defaultPriority());
-                    insert.executeUpdate();
-                }
-            }
-        }
-    }
-}