Use diamond type

samples/xml/gae/src/main/java/samples/gae/security/GaeUserAuthentication.java

@@ -39,7 +39,7 @@ public class GaeUserAuthentication implements Authentication {
 	}
 
 	public Collection<GrantedAuthority> getAuthorities() {
-		return new HashSet<GrantedAuthority>(principal.getAuthorities());
+		return new HashSet<>(principal.getAuthorities());
 	}
 
 	public Object getCredentials() {

samples/xml/gae/src/main/java/samples/gae/users/InMemoryUserRegistry.java

@@ -30,7 +30,7 @@ public class InMemoryUserRegistry implements UserRegistry {
 	private final Logger logger = LoggerFactory.getLogger(getClass());
 
 	private final Map<String, GaeUser> users = Collections
-			.synchronizedMap(new HashMap<String, GaeUser>());
+			.synchronizedMap(new HashMap<>());
 
 	public GaeUser findUser(String userId) {
 		return users.get(userId);