diff --git a/Medical/MedicalDatabaseContracts/IStorage.cs b/Medical/MedicalDatabaseContracts/IStorage.cs
new file mode 100644
index 0000000..f2a8609
--- /dev/null
+++ b/Medical/MedicalDatabaseContracts/IStorage.cs
@@ -0,0 +1,13 @@
+using MedicalDatabaseContracts.Models;
+
+namespace MedicalDatabaseContracts
+{
+    public interface IStorage<T> where T : AbstractModel
+    {
+        T? Get(int id);
+        List<T> GetAll();
+        void Insert(T item);
+        void Update(T item);
+        void Delete(int id);
+    }
+}