diff --git a/src/main/java/org/redisson/Config.java b/src/main/java/org/redisson/Config.java
index 493795f74..7066e09a3 100644
--- a/src/main/java/org/redisson/Config.java
+++ b/src/main/java/org/redisson/Config.java
@@ -231,14 +231,6 @@ public class Config {
         return this.sentinelServersConfig;
     }
 
-    /**
-     * Deprecated. Use {@link #useSentinelServers()} instead
-     */
-    @Deprecated
-    public SentinelServersConfig useSentinelConnection() {
-        return useSentinelServers();
-    }
-
     SentinelServersConfig getSentinelServersConfig() {
         return sentinelServersConfig;
     }
@@ -272,13 +264,6 @@ public class Config {
         return masterSlaveServersConfig;
     }
 
-    /**
-     * Deprecated. Use {@link #useMasterSlaveServers()} instead
-     */
-    @Deprecated
-    public MasterSlaveServersConfig useMasterSlaveConnection() {
-        return useMasterSlaveServers();
-    }
     MasterSlaveServersConfig getMasterSlaveServersConfig() {
         return masterSlaveServersConfig;
     }
@@ -346,8 +331,11 @@ public class Config {
     }
 
     /**
-     * Use defined eventLoopGroup instance.
-     * Thus several Redisson instances can use one eventLoopGroup instance.
+     * Use external EventLoopGroup. EventLoopGroup processes all
+     * Netty connection tied with Redis servers. Each EventLoopGroup creates
+     * own threads and each Redisson client creates own EventLoopGroup by default.
+     * So if there are multiple Redisson instances in same JVM
+     * it would be useful to share one EventLoopGroup among them.
      * <p/>
      * Only {@link io.netty.channel.epoll.EpollEventLoopGroup} or
      * {@link io.netty.channel.nio.NioEventLoopGroup} can be used.
diff --git a/src/main/java/org/redisson/core/RLock.java b/src/main/java/org/redisson/core/RLock.java
index 174c941de..2ff50805d 100644
--- a/src/main/java/org/redisson/core/RLock.java
+++ b/src/main/java/org/redisson/core/RLock.java
@@ -124,6 +124,6 @@ public interface RLock extends Lock, RExpirable {
 
     Future<Boolean> tryLockAsync(long waitTime, TimeUnit unit);
 
-    Future<Boolean> tryLockAsync(final long waitTime, final long leaseTime, final TimeUnit unit);
+    Future<Boolean> tryLockAsync(long waitTime, long leaseTime, TimeUnit unit);
 
 }
diff --git a/src/main/java/org/redisson/core/RedissonMultiLock.java b/src/main/java/org/redisson/core/RedissonMultiLock.java
index c4f836438..22264cb58 100644
--- a/src/main/java/org/redisson/core/RedissonMultiLock.java
+++ b/src/main/java/org/redisson/core/RedissonMultiLock.java
@@ -34,12 +34,27 @@ import io.netty.util.concurrent.FutureListener;
 import io.netty.util.concurrent.Promise;
 import io.netty.util.internal.PlatformDependent;
 
+/**
+ * Guarantees multiple locks operation handling (lock, tryLock...)
+ * in atomic way without deadlocks.
+ *
+ * @author Nikita Koksharov
+ *
+ */
 public class RedissonMultiLock implements Lock {
 
     final List<RLock> locks = new ArrayList<RLock>();
 
+    /**
+     * Creates instance with multiple {@link RLock} objects.
+     * Each RLock object could be created by own Redisson instance.
+     *
+     * @param locks
+     */
     public RedissonMultiLock(RLock... locks) {
-        super();
+        if (locks.length == 0) {
+            throw new IllegalArgumentException("Lock objects are not defined");
+        }
         this.locks.addAll(Arrays.asList(locks));
     }