Elwig: Add BackupService

Elwig/Helpers/Printing/Pdf.cs

@@ -1,20 +1,17 @@
 using Elwig.Services;
 using Elwig.Windows;
 using System;
-using System.Threading.Tasks;
 
 namespace Elwig.Helpers.Printing {
     public static class Pdf {
 
-        public static Task Init(Action? evtHandler = null) {
+        public static void Init(Action? evtHandler = null) {
             PdfiumNative.FPDF_InitLibrary();
             evtHandler?.Invoke();
-            return Task.CompletedTask;
         }
 
-        public static Task Cleanup() {
+        public static void Cleanup() {
             PdfiumNative.FPDF_DestroyLibrary();
-            return Task.CompletedTask;
         }
 
         public static void Show(TempFile file, string title) {
@@ -31,14 +28,13 @@ namespace Elwig.Helpers.Printing {
             });
         }
 
-        public static Task Print(string path, int copies = 1, bool doublePaged = false) {
+        public static void Print(string path, int copies = 1, bool doublePaged = false) {
             try {
                 var printer = new PdfPrinter();
                 printer.Print(path, copies, doublePaged);
             } catch (Exception exc) {
                 InteractionService.ShowException("Fehler beim Drucken", "Beim Drucken ist ein Fehler aufgetreten", exc);
             }
-            return Task.CompletedTask;
         }
     }
 }