diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
index ad39e4f..fe18948 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
@@ -17,7 +17,9 @@ import org.gcube.informationsystem.model.relation.ConsistsOf;
 import org.gcube.informationsystem.model.relation.IsRelatedTo;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
+import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAlreadyPresentException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetNotFoundException;
+import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceAlreadyPresentException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.rest.ERPath;
 import org.gcube.informationsystem.resourceregistry.context.ContextUtility;
@@ -60,7 +62,7 @@ public class ERManager {
 	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
 	@Produces(MediaType.APPLICATION_JSON)
 	public String createFacet(@PathParam(TYPE_PATH_PARAM) String type,
-			String json) throws ResourceRegistryException {
+			String json) throws FacetAlreadyPresentException, ResourceRegistryException {
 		logger.info("requested facet creation for type {} defined by {} ",
 				type, json);
 		FacetManagement facetManagement = new FacetManagement();
@@ -131,8 +133,7 @@ public class ERManager {
 	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
 	@Produces(MediaType.APPLICATION_JSON)
 	public String createResource(@PathParam(TYPE_PATH_PARAM) String type,
-			String json) throws FacetNotFoundException,
-			ResourceRegistryException {
+			String json) throws ResourceAlreadyPresentException, ResourceRegistryException {
 		logger.info("requested resource creation for type {} with json {}",
 				type, json);
 		ResourceManagement resourceManagement = new ResourceManagement();
@@ -146,7 +147,7 @@ public class ERManager {
 	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
 	@Produces(MediaType.APPLICATION_JSON)
 	public String updateResource(@PathParam(ID_PATH_PARAM) String uuid,
-			String json) throws FacetNotFoundException,
+			String json) throws ResourceNotFoundException,
 			ResourceRegistryException {
 		logger.info("requested resource update for id {} with {}", uuid, json);
 		ResourceManagement resourceManagement = new ResourceManagement();