Fixes to CaughtException and AnalysisException

editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart

Index: editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart
diff --git a/editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart b/editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart
index 3c2d08ff0405bdb193f08d8f1902ba2cba3d8b72..e4e6b7c1b3d1755e23f3992b23b223f8375648d4 100644
--- a/editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart
+++ b/editor/util/plugins/com.google.dart.java2dart/resources/java_engine.dart
@@ -255,6 +255,17 @@ class AnalysisException implements Exception {
    * [cause].
    */
   AnalysisException([this.message = 'Exception', this.cause = null]);
+
+  String toString() {
+    StringBuffer buffer = new StringBuffer();
+    buffer.write("AnalysisException: ");
+    buffer.writeln(message);
+    if (cause != null) {
+      buffer.write('Caused by ');
+      cause._writeOn(buffer);
+    }
+    return buffer.toString();
+  }
 }
 
 
@@ -266,7 +277,7 @@ class CaughtException implements Exception {
   /**
    * The exception that was caught.
    */
-  final Exception exception;
+  final Object exception;
 
   /**
    * The stack trace associated with the exception.