Updated JavaDoc

spring-eai-core/src/main/java/org/springframework/eai/MessageDeliveryException.java

@@ -17,6 +17,8 @@
 package org.springframework.eai;
 
 /**
+ * Exception that indicates an error during message delivery.
+ * 
  * @author Mark Fisher
  */
 @SuppressWarnings("serial")

spring-eai-core/src/main/java/org/springframework/eai/MessageHandlingException.java

@@ -17,6 +17,8 @@
 package org.springframework.eai;
 
 /**
+ * Exception that indicates an error during message handling.
+ * 
  * @author Mark Fisher
  */
 @SuppressWarnings("serial")

spring-eai-core/src/main/java/org/springframework/eai/MessagingException.java

@@ -17,6 +17,8 @@
 package org.springframework.eai;
 
 /**
+ * The base exception for any failures within the messaging system.
+ * 
  * @author Mark Fisher
  */
 @SuppressWarnings("serial")