Export: Refactor interfaces and classes

Elwig/Helpers/Export/IExporter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Elwig.Helpers.Export {
+    public interface IExporter<T> : IDisposable, IAsyncDisposable {
+        /// <summary>
+        /// The default file extension of the exported files to be used (whithout a preceding ".")
+        /// </summary>
+        static string FileExtension { get; }
+
+        /// <summary>
+        /// Export the given data to the given file.
+        /// </summary>
+        /// <param name="data">The data to be exported</param>
+        void Export(IEnumerable<T> data);
+
+        /// <summary>
+        /// Export the given data to the given file.
+        /// </summary>
+        /// <param name="data">The data to be exported</param>
+        Task ExportAsync(IEnumerable<T> data);
+    }
+}