Add missing @since tag

spring-context/src/main/java/org/springframework/cache/interceptor/BaseCacheResolver.java

@@ -31,6 +31,7 @@ import org.springframework.util.Assert;
  * invocation context.
  *
  * @author Stephane Nicoll
+ * @since 4.1
  */
 public abstract class BaseCacheResolver implements CacheResolver, InitializingBean {
 

spring-context/src/main/java/org/springframework/cache/interceptor/CacheOperation.java

@@ -27,6 +27,7 @@ import org.springframework.util.Assert;
  *
  * @author Costin Leau
  * @author Stephane Nicoll
+ * @since 3.1
  */
 public abstract class CacheOperation implements BasicCacheOperation {
 

spring-context/src/main/java/org/springframework/cache/interceptor/CacheProxyFactoryBean.java

@@ -35,6 +35,7 @@ import org.springframework.aop.support.DefaultPointcutAdvisor;
  * of the Spring reference documentation for more information.
  *
  * @author Costin Leau
+ * @since 3.1
  * @see org.springframework.aop.framework.ProxyFactoryBean
  * @see CacheInterceptor
  */

spring-context/src/main/java/org/springframework/cache/interceptor/NameMatchCacheOperationSource.java

@@ -32,6 +32,7 @@ import org.springframework.util.PatternMatchUtils;
  * by registered name.
  *
  * @author Costin Leau
+ * @since 3.1
  */
 @SuppressWarnings("serial")
 public class NameMatchCacheOperationSource implements CacheOperationSource, Serializable {

spring-context/src/main/java/org/springframework/cache/interceptor/NamedCacheResolver.java

@@ -28,6 +28,7 @@ import org.springframework.cache.CacheManager;
  * collection of name(s) against a given {@link CacheManager}.
  *
  * @author Stephane Nicoll
+ * @since 4.1
  */
 public class NamedCacheResolver extends BaseCacheResolver {