set up postgresql repository

src/Core/Repositories/BaseRepository.cs

@@ -0,0 +1,31 @@
+using System;
+using Dapper;
+
+namespace Bit.Core.Repositories
+{
+    public abstract class BaseRepository
+    {
+        static BaseRepository()
+        {
+            SqlMapper.AddTypeHandler(new DateTimeHandler());
+        }
+
+        public BaseRepository(string connectionString, string readOnlyConnectionString)
+        {
+            if(string.IsNullOrWhiteSpace(connectionString))
+            {
+                throw new ArgumentNullException(nameof(connectionString));
+            }
+            if(string.IsNullOrWhiteSpace(readOnlyConnectionString))
+            {
+                throw new ArgumentNullException(nameof(readOnlyConnectionString));
+            }
+
+            ConnectionString = connectionString;
+            ReadOnlyConnectionString = readOnlyConnectionString;
+        }
+
+        protected string ConnectionString { get; private set; }
+        protected string ReadOnlyConnectionString { get; private set; }
+    }
+}