public DatabaseUpgradeChecker() {
_dao = new VersionDaoImpl();
_upgradeMap.put("2.1.7", new DbUpgrade[] {new Upgrade217to218(), new Upgrade218to22(), new Upgrade221to222(),
new UpgradeSnapshot217to224(), new Upgrade222to224(), new Upgrade224to225(), new Upgrade225to226(),
new Upgrade227to228(), new Upgrade228to229(), new Upgrade229to2210(), new Upgrade2210to2211(),
new Upgrade2211to2212(), new Upgrade2212to2213(), new Upgrade2213to2214(), new Upgrade2214to30(),
new Upgrade30to301(), new Upgrade301to302(), new Upgrade302to40(), new Upgrade40to41(), new Upgrade410to420(), new Upgrade420to421(), new Upgrade421to430()});
_upgradeMap.put("2.1.8", new DbUpgrade[] {new Upgrade218to22(), new Upgrade221to222(), new UpgradeSnapshot217to224(),
new Upgrade222to224(), new Upgrade218to224DomainVlans(), new Upgrade224to225(), new Upgrade225to226(),
new Upgrade227to228(), new Upgrade228to229(), new Upgrade229to2210(), new Upgrade2210to2211(),
new Upgrade2211to2212(), new Upgrade2212to2213(), new Upgrade2213to2214(),
new Upgrade2214to30(), new Upgrade30to301(), new Upgrade301to302(), new Upgrade302to40(), new Upgrade40to41(), new Upgrade410to420(), new Upgrade420to421(),
new Upgrade421to430()});
_upgradeMap.put("2.1.9", new DbUpgrade[] {new Upgrade218to22(), new Upgrade221to222(), new UpgradeSnapshot217to224(),
new Upgrade222to224(), new Upgrade218to224DomainVlans(), new Upgrade224to225(), new Upgrade225to226(),
new Upgrade227to228(), new Upgrade228to229(), new Upgrade229to2210(), new Upgrade2210to2211(),
new Upgrade2211to2212(), new Upgrade2212to2213(), new Upgrade2213to2214(), new Upgrade2214to30(),
new Upgrade30to301(), new Upgrade301to302(), new Upgrade302to40(), new Upgrade40to41(), new Upgrade410to420(), new Upgrade420to421(), new Upgrade421to430()});