src/java.compiler/share/classes/javax/tools/DiagnosticCollector.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -41,10 +41,15 @@
  */
 public final class DiagnosticCollector<S> implements DiagnosticListener<S> {
     private List<Diagnostic<? extends S>> diagnostics =
             Collections.synchronizedList(new ArrayList<Diagnostic<? extends S>>());
 
+    /**
+     * Creates a new instance of DiagnosticCollector.
+     */
+    public DiagnosticCollector() {}
+
     public void report(Diagnostic<? extends S> diagnostic) {
         Objects.requireNonNull(diagnostic);
         diagnostics.add(diagnostic);
     }