Move IDatabaseApi into it's own file.

src/Volo.Abp/Volo/Abp/Uow/IDatabaseApi.cs

@@ -0,0 +1,11 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.Uow
+{
+    public interface IDatabaseApi
+    {
+        Task SaveChangesAsync();
+
+        Task CommitAsync();
+    }
+}

src/Volo.Abp/Volo/Abp/Uow/IUnitOfWorkManager.cs

@@ -1,6 +1,4 @@
-using System.Threading.Tasks;
+namespace Volo.Abp.Uow
-
-namespace Volo.Abp.Uow
 {
     public interface IUnitOfWorkManager
     {
@@ -8,11 +6,4 @@ namespace Volo.Abp.Uow
 
         IUnitOfWork Begin();
     }
-
-    public interface IDatabaseApi
-    {
-        Task SaveChangesAsync();
-
-        Task CommitAsync();
-    }
 }