Start using UncheckedIOException as base for RuntimeJsonMappingException

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/MappingIterator.java

@@ -2,6 +2,7 @@
 
 import java.io.Closeable;
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.util.*;
 
 import com.fasterxml.jackson.core.*;
@@ -400,6 +401,6 @@ protected <R> R _handleMappingException(JsonMappingException e) {
     }
 
     protected <R> R _handleIOException(IOException e) {
-        throw new RuntimeException(e.getMessage(), e);
+        throw new UncheckedIOException(e.getMessage(), e);
     }
 }

src/main/java/com/fasterxml/jackson/databind/exc/RuntimeJsonMappingException.java

@@ -1,22 +1,20 @@
 package com.fasterxml.jackson.databind.exc;
 
+import java.io.UncheckedIOException;
+
 import com.fasterxml.jackson.databind.JsonMappingException;
 
 /**
  * Wrapper used when interface does not allow throwing a checked
  * {@link JsonMappingException}
  */
 @SuppressWarnings("serial")
-public class RuntimeJsonMappingException extends RuntimeException
+public class RuntimeJsonMappingException extends UncheckedIOException
 {
     public RuntimeJsonMappingException(JsonMappingException cause) {
         super(cause);
     }
 
-    public RuntimeJsonMappingException(String message) {
-        super(message);
-    }
-
     public RuntimeJsonMappingException(String message, JsonMappingException cause) {
         super(message, cause);
     }