few comments

src/main/java/org/redisson/RedissonClient.java

@@ -52,8 +52,22 @@ import org.redisson.core.RTopic;
  */
 public interface RedissonClient {
 
+    /**
+     * Returns map-based cache instance with eviction support by name
+     * using provided codec for both cache keys and values.
+     *
+     * @param name
+     * @param codec
+     * @return
+     */
     <K, V> RCache<K, V> getCache(String name, Codec codec);
 
+    /**
+     * Returns map-based cache instance with eviction support by name.
+     *
+     * @param name
+     * @return
+     */
     <K, V> RCache<K, V> getCache(String name);
 
     /**