--- a/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/ModuleSummaryWriter.java	Wed Jul 05 22:07:34 2017 +0200
+++ b/langtools/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/ModuleSummaryWriter.java	Mon Aug 22 16:32:40 2016 -0700
@@ -25,10 +25,7 @@
 
 package jdk.javadoc.internal.doclets.toolkit;
 
-import java.io.*;
-import java.util.Set;
-
-import javax.lang.model.element.PackageElement;
+import jdk.javadoc.internal.doclets.toolkit.util.DocFileIOException;
 
 /**
  * The interface for writing module summary output.
@@ -130,6 +127,7 @@
      * Print the module summary document.
      *
      * @param contentTree the content tree that will be printed
+     * @throws DocFileIOException if there is a problem while writing the document
      */
-    public abstract void printDocument(Content contentTree) throws IOException;
+    public abstract void printDocument(Content contentTree) throws DocFileIOException;
 }