Add project files.

ModVersionChecker/managers/interfaces/ISourcesDefManager.cs

@@ -0,0 +1,19 @@
+using ModVersionChecker.data.model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ModVersionChecker.managers.interfaces
+{
+    public interface ISourcesDefManager
+    {
+        List<SourceDef> List();
+
+        SourceDef? GetById(string id);
+        void AddSourceDef(SourceDef sourceDef);
+        void RemoveSourceDef(string id);
+        void Save(SourceDef sourceDef);
+    }
+}