Add some JavaDocs

spring-integration-java-dsl/src/main/java/org/springframework/integration/dsl/IntegrationFlows.java

@@ -25,6 +25,8 @@ import org.springframework.integration.dsl.support.EndpointConfigurer;
 import org.springframework.messaging.MessageChannel;
 
 /**
+ * The central factory for fluent {@link IntegrationFlowBuilder} API.
+ *
  * @author Artem Bilan
  */
 public final class IntegrationFlows {

spring-integration-java-dsl/src/main/java/org/springframework/integration/dsl/core/IntegrationComponentSpec.java

@@ -17,8 +17,9 @@
 package org.springframework.integration.dsl.core;
 
 /**
+ * The common Builder abstraction.
+ *
  * @author Artem Bilan
-
  */
 public abstract class IntegrationComponentSpec<S extends IntegrationComponentSpec<S, T>, T> {