first commit

typo3/sysext/install/Classes/Service/Exception/ConfigurationChangedException.php

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+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Install\Service\Exception;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Install\Service\Exception;
+
+/**
+ * An exception thrown if the silent configuration updater changed configuration
+ */
+class ConfigurationChangedException extends Exception
+{
+}

typo3/sysext/install/Classes/Service/Exception/CoreVersionServiceException.php

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+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Install\Service\Exception;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Install\Service\Exception;
+
+/**
+ * An exception thrown if version validation against official version matrix fails
+ */
+class CoreVersionServiceException extends Exception
+{
+}

typo3/sysext/install/Classes/Service/Exception/RemoteFetchException.php

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+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Install\Service\Exception;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+/**
+ * An exception thrown if fetching a resource from a remote server fails
+ */
+class RemoteFetchException extends CoreVersionServiceException
+{
+}