Preparation for Switching to a New Database Version (#1521)

* preparing to switch to a new database version

* add PreAuthorize

---------

Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>

src/main/java/stirling/software/SPDF/config/DatabaseBackupInterface.java

@@ -0,0 +1,16 @@
+package stirling.software.SPDF.config;
+
+import java.io.IOException;
+import java.util.List;
+
+import stirling.software.SPDF.utils.FileInfo;
+
+public interface DatabaseBackupInterface {
+    void exportDatabase() throws IOException;
+
+    boolean importDatabase();
+
+    boolean hasBackup();
+
+    List<FileInfo> getBackupList();
+}