diff --git a/src/main/java/de/ids_mannheim/korap/interfaces/ResourceOperationIface.java b/src/main/java/de/ids_mannheim/korap/interfaces/ResourceOperationIface.java
new file mode 100644
index 0000000..fa0bf35
--- /dev/null
+++ b/src/main/java/de/ids_mannheim/korap/interfaces/ResourceOperationIface.java
@@ -0,0 +1,42 @@
+package de.ids_mannheim.korap.interfaces;
+
+import de.ids_mannheim.korap.exceptions.KustvaktException;
+import de.ids_mannheim.korap.resources.KustvaktResource;
+import de.ids_mannheim.korap.user.User;
+
+import java.util.Collection;
+import java.util.List;
+
+// todo: for transaction to work this should go into core module!?!
+// todo: user instance only required for auditing pointcut operations
+public interface ResourceOperationIface<T extends KustvaktResource> {
+
+    Class<T> getType();
+
+    <T extends KustvaktResource> T findbyId(String id, User user)
+            throws KustvaktException;
+
+    <T extends KustvaktResource> T findbyId(Integer id, User user)
+            throws KustvaktException;
+
+    List<T> getResources(Collection<Object> ids, User user)
+            throws KustvaktException;
+
+    int updateResource(T resource, User user) throws KustvaktException;
+
+    int[] updateResources(List<T> resources, User user)
+            throws KustvaktException;
+
+    /**
+     * store a resource and return the id of the inserted value
+     *
+     * @param resource
+     * @return
+     * @throws KustvaktException
+     */
+    int storeResource(T resource, User user) throws KustvaktException;
+
+    //    public void deleteResource(Integer id, User user) throws KorAPException;
+    int deleteResource(String id, User user) throws KustvaktException;
+
+}