fix EhCache

@@ -17,22 +17,21 @@ public class EhCache implements CacheInterface {
 
 	private static final Logger logger = LoggerFactory.getLogger(EhCache.class);
 
-	private CacheManager cacheManager;
-
-	private Cache cache;
+	private static final CacheManager cacheManager = CacheManager.create();
 
 	private static final String cacheName = "talent";
+	
+	private Cache cache;
 
 	private EhCache() {
 	}
 
 	@PostConstruct
 	private void init() {
-		this.cacheManager = CacheManager.create();
-		this.cacheManager.addCache(cacheName);
+		cacheManager.addCache(cacheName);
 		this.cache = cacheManager.getCache(cacheName);
 	}
-
+	
 	@Override
 	public void addOrUpdate(String key, CacheObject value, int expiredTimeInMinute) {
 		try {