diff --git a/services/src/main/java/org/keycloak/services/resources/PublicRealmResource.java b/services/src/main/java/org/keycloak/services/resources/PublicRealmResource.java
index ab12f38295..7085eab839 100755
--- a/services/src/main/java/org/keycloak/services/resources/PublicRealmResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/PublicRealmResource.java
@@ -41,7 +41,7 @@ public class PublicRealmResource {
     @NoCache
     @Produces("application/json")
     public PublishedRealmRepresentation getRealm(@PathParam("realm") String id) {
-        return new Transaction() {
+        return new Transaction<PublishedRealmRepresentation>() {
             protected PublishedRealmRepresentation callImpl() {
                 return realmRep(realm, uriInfo);
             }
@@ -53,7 +53,7 @@ public class PublicRealmResource {
     @Path("html")
     @Produces("text/html")
     public String getRealmHtml(@PathParam("realm") String id) {
-        return new Transaction() {
+        return new Transaction<String>() {
             protected String callImpl() {
                 StringBuffer html = new StringBuffer();
 
diff --git a/services/src/main/java/org/keycloak/services/resources/RealmsResource.java b/services/src/main/java/org/keycloak/services/resources/RealmsResource.java
index 9f626a4f6e..3a4fa57609 100755
--- a/services/src/main/java/org/keycloak/services/resources/RealmsResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/RealmsResource.java
@@ -53,7 +53,7 @@ public class RealmsResource {
 
     @Path("{realm}/tokens")
     public TokenService getTokenService(final @PathParam("realm") String id) {
-        return new Transaction(false) {
+        return new Transaction<TokenService>(false) {
             @Override
             protected TokenService callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -72,7 +72,7 @@ public class RealmsResource {
 
     @Path("{realm}")
     public PublicRealmResource getRealmResource(final @PathParam("realm") String id) {
-        return new Transaction(false) {
+        return new Transaction<PublicRealmResource>(false) {
             @Override
             protected PublicRealmResource callImpl() {
                 RealmManager realmManager = new RealmManager(session);
diff --git a/services/src/main/java/org/keycloak/services/resources/SaasService.java b/services/src/main/java/org/keycloak/services/resources/SaasService.java
index b472e87fd9..e969d7e05d 100755
--- a/services/src/main/java/org/keycloak/services/resources/SaasService.java
+++ b/services/src/main/java/org/keycloak/services/resources/SaasService.java
@@ -79,7 +79,7 @@ public class SaasService {
     @NoCache
     public Response keepalive(final @Context HttpHeaders headers) {
         logger.info("keepalive");
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             public Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -101,7 +101,7 @@ public class SaasService {
     @Produces("application/json")
     @NoCache
     public Response whoAmI(final @Context HttpHeaders headers) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             public Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -122,7 +122,7 @@ public class SaasService {
     @Produces("application/javascript")
     @NoCache
     public String isLoggedIn(final @Context HttpHeaders headers) {
-        return new Transaction() {
+        return new Transaction<String>() {
             @Override
             public String callImpl() {
                 logger.info("WHOAMI Javascript start.");
@@ -152,7 +152,7 @@ public class SaasService {
 
     @Path("admin/realms")
     public RealmsAdminResource getRealmsAdmin(@Context final HttpHeaders headers) {
-        return new Transaction(false) {
+        return new Transaction<RealmsAdminResource>(false) {
             @Override
             protected RealmsAdminResource callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -239,7 +239,7 @@ public class SaasService {
     @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
     public Response processLogin(final MultivaluedMap<String, String> formData) {
         logger.info("processLogin start");
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -283,7 +283,7 @@ public class SaasService {
     @POST
     @Consumes(MediaType.APPLICATION_JSON)
     public Response register(final UserRepresentation newUser) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -302,7 +302,7 @@ public class SaasService {
     @POST
     @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
     public Response processRegister(final MultivaluedMap<String, String> formData) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
diff --git a/services/src/main/java/org/keycloak/services/resources/SocialResource.java b/services/src/main/java/org/keycloak/services/resources/SocialResource.java
index ef4b2d9926..35d625a57e 100644
--- a/services/src/main/java/org/keycloak/services/resources/SocialResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/SocialResource.java
@@ -91,7 +91,7 @@ public class SocialResource {
     @GET
     @Path("callback")
     public Response callback() throws URISyntaxException {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 Map<String, String[]> queryParams = getQueryParams();
 
diff --git a/services/src/main/java/org/keycloak/services/resources/TokenService.java b/services/src/main/java/org/keycloak/services/resources/TokenService.java
index 6068d2e269..7488fe1685 100755
--- a/services/src/main/java/org/keycloak/services/resources/TokenService.java
+++ b/services/src/main/java/org/keycloak/services/resources/TokenService.java
@@ -118,7 +118,7 @@ public class TokenService {
     @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
     @Produces(MediaType.APPLICATION_JSON)
     public Response grantIdentityToken(final MultivaluedMap<String, String> form) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 String username = form.getFirst(AuthenticationManager.FORM_USERNAME);
                 if (username == null) {
@@ -151,7 +151,7 @@ public class TokenService {
     @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
     @Produces(MediaType.APPLICATION_JSON)
     public Response grantAccessToken(final MultivaluedMap<String, String> form) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 String username = form.getFirst(AuthenticationManager.FORM_USERNAME);
                 if (username == null) {
@@ -185,7 +185,7 @@ public class TokenService {
     public Response processLogin(@QueryParam("client_id") final String clientId, @QueryParam("scope") final String scopeParam,
             @QueryParam("state") final String state, @QueryParam("redirect_uri") final String redirect,
             final MultivaluedMap<String, String> formData) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 OAuthFlows oauth = Flows.oauth(realm, request, uriInfo, authManager, tokenManager);
 
@@ -229,7 +229,7 @@ public class TokenService {
     public Response processRegister(@QueryParam("client_id") final String clientId,
             @QueryParam("scope") final String scopeParam, @QueryParam("state") final String state,
             @QueryParam("redirect_uri") final String redirect, final MultivaluedMap<String, String> formData) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 OAuthFlows oauth = Flows.oauth(realm, request, uriInfo, authManager, tokenManager);
@@ -310,7 +310,7 @@ public class TokenService {
     @POST
     @Produces("application/json")
     public Response accessCodeToToken(final MultivaluedMap<String, String> formData) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 logger.info("accessRequest <---");
                 if (!realm.isEnabled()) {
@@ -438,7 +438,7 @@ public class TokenService {
     public Response loginPage(final @QueryParam("response_type") String responseType,
             final @QueryParam("redirect_uri") String redirect, final @QueryParam("client_id") String clientId,
             final @QueryParam("scope") String scopeParam, final @QueryParam("state") String state) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 OAuthFlows oauth = Flows.oauth(realm, request, uriInfo, authManager, tokenManager);
 
@@ -486,7 +486,7 @@ public class TokenService {
     public Response registerPage(final @QueryParam("response_type") String responseType,
             final @QueryParam("redirect_uri") String redirect, final @QueryParam("client_id") String clientId,
             final @QueryParam("scope") String scopeParam, final @QueryParam("state") String state) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 OAuthFlows oauth = Flows.oauth(realm, request, uriInfo, authManager, tokenManager);
 
@@ -517,7 +517,7 @@ public class TokenService {
     @GET
     @NoCache
     public Response logout(final @QueryParam("redirect_uri") String redirectUri) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 // todo do we care if anybody can trigger this?
 
@@ -537,7 +537,7 @@ public class TokenService {
     @POST
     @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
     public Response processOAuth(final MultivaluedMap<String, String> formData) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             protected Response callImpl() {
                 OAuthFlows oauth = Flows.oauth(realm, request, uriInfo, authManager, tokenManager);
 
diff --git a/services/src/main/java/org/keycloak/services/resources/Transaction.java b/services/src/main/java/org/keycloak/services/resources/Transaction.java
index 32f4319d1b..d88cc050b7 100755
--- a/services/src/main/java/org/keycloak/services/resources/Transaction.java
+++ b/services/src/main/java/org/keycloak/services/resources/Transaction.java
@@ -13,7 +13,7 @@ import javax.ws.rs.core.Application;
  * @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
  * @version $Revision: 1 $
  */
-public class Transaction {
+public class Transaction<T> {
     protected KeycloakSession session;
     protected KeycloakTransaction transaction;
     protected boolean closeSession;
@@ -83,7 +83,7 @@ public class Transaction {
         }
     }
 
-    protected <T> T callImpl() {
+    protected T callImpl() {
         return null;
     }
 
@@ -91,7 +91,7 @@ public class Transaction {
      * Will not begin or end a transaction or close a session if the transaction was already active when called
      *
      */
-    public <T> T call() {
+    public T call() {
         boolean wasActive = transaction.isActive();
         if (!wasActive) transaction.begin();
         try {
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/ApplicationResource.java b/services/src/main/java/org/keycloak/services/resources/admin/ApplicationResource.java
index 35038d2984..36540ac1b1 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/ApplicationResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/ApplicationResource.java
@@ -36,7 +36,7 @@ public class ApplicationResource {
     @PUT
     @Consumes(MediaType.APPLICATION_JSON)
     public void update(final ApplicationRepresentation rep) {
-        new Transaction() {
+        new Transaction<Void>() {
             @Override
             protected void runImpl() {
                 ResourceManager resourceManager = new ResourceManager(new RealmManager(session));
@@ -50,7 +50,7 @@ public class ApplicationResource {
     @NoCache
     @Produces(MediaType.APPLICATION_JSON)
     public ApplicationRepresentation getResource(final @PathParam("id") String id) {
-        return new Transaction() {
+        return new Transaction<ApplicationRepresentation>() {
             @Override
             protected ApplicationRepresentation callImpl() {
                ResourceManager resourceManager = new ResourceManager(new RealmManager(session));
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/ApplicationsResource.java b/services/src/main/java/org/keycloak/services/resources/admin/ApplicationsResource.java
index e7496af971..9be8bbdc7e 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/ApplicationsResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/ApplicationsResource.java
@@ -42,7 +42,7 @@ public class ApplicationsResource {
     @Produces(MediaType.APPLICATION_JSON)
     @NoCache
     public List<ApplicationRepresentation> getResources() {
-        return new Transaction() {
+        return new Transaction<List<ApplicationRepresentation>>() {
             @Override
             protected List<ApplicationRepresentation> callImpl() {
                 List<ApplicationRepresentation> rep = new ArrayList<ApplicationRepresentation>();
@@ -59,7 +59,7 @@ public class ApplicationsResource {
     @POST
     @Consumes(MediaType.APPLICATION_JSON)
     public Response createResource(final @Context UriInfo uriInfo, final ApplicationRepresentation rep) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 ResourceManager resourceManager = new ResourceManager(new RealmManager(session));
@@ -71,7 +71,7 @@ public class ApplicationsResource {
 
     @Path("{id}")
     public ApplicationResource getResource(final @PathParam("id") String id) {
-        return new Transaction(false) {
+        return new Transaction<ApplicationResource>(false) {
             @Override
             protected ApplicationResource callImpl() {
                 ApplicationModel applicationModel = realm.getApplicationById(id);
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java b/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
index 539d34bc04..c8309cbd1e 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
@@ -49,7 +49,7 @@ public class RealmAdminResource {
     @NoCache
     @Produces("application/json")
     public RealmRepresentation getRealm() {
-        return new Transaction() {
+        return new Transaction<RealmRepresentation>() {
             @Override
             protected RealmRepresentation callImpl() {
                 return new RealmManager(session).toRepresentation(realm);
@@ -63,7 +63,7 @@ public class RealmAdminResource {
     @NoCache
     @Produces("application/json")
     public List<RoleRepresentation> getRoles() {
-        return new Transaction() {
+        return new Transaction<List<RoleRepresentation>>() {
             @Override
             protected List<RoleRepresentation> callImpl() {
                 List<RoleModel> roleModels = realm.getRoles();
@@ -95,7 +95,7 @@ public class RealmAdminResource {
     @NoCache
     @Produces("application/json")
     public RoleRepresentation getRole(final @PathParam("id") String id) {
-        return new Transaction() {
+        return new Transaction<RoleRepresentation>() {
             @Override
             protected RoleRepresentation callImpl() {
                 RoleModel roleModel = realm.getRoleById(id);
@@ -132,7 +132,7 @@ public class RealmAdminResource {
     @POST
     @Consumes("application/json")
     public Response createRole(final @Context UriInfo uriInfo, final RoleRepresentation rep) {
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 if (realm.getRole(rep.getName()) != null) {
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/RealmsAdminResource.java b/services/src/main/java/org/keycloak/services/resources/admin/RealmsAdminResource.java
index fd5485a507..1082f69a04 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/RealmsAdminResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/RealmsAdminResource.java
@@ -54,7 +54,7 @@ public class RealmsAdminResource {
     @NoCache
     @Produces("application/json")
     public List<RealmRepresentation> getRealms() {
-        return new Transaction() {
+        return new Transaction<List<RealmRepresentation>>() {
             @Override
             protected  List<RealmRepresentation> callImpl() {
                 logger.info(("getRealms()"));
@@ -81,7 +81,7 @@ public class RealmsAdminResource {
     @Consumes("application/json")
     public Response importRealm(@Context final UriInfo uriInfo, final RealmRepresentation rep) {
         logger.info("importRealm: " + rep.getRealm());
-        return new Transaction() {
+        return new Transaction<Response>() {
             @Override
             protected Response callImpl() {
                 RealmManager realmManager = new RealmManager(session);
@@ -96,7 +96,7 @@ public class RealmsAdminResource {
     @Path("{id}")
     public RealmAdminResource getRealmAdmin(@Context final HttpHeaders headers,
                                             @PathParam("id") final String id) {
-        return new Transaction(false) {
+        return new Transaction<RealmAdminResource>(false) {
             @Override
             protected RealmAdminResource callImpl() {
                 RealmManager realmManager = new RealmManager(session);