Store third-party annotations in a separate directory

third-party/annotations/org/eclipse/jdt/annotation/Nullable.java

@@ -0,0 +1,42 @@
+/*******************************************************************************
+ * Copyright (c) 2011, 2013 Stephan Herrmann and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Stephan Herrmann - initial API and implementation
+ *     IBM Corporation - bug fixes
+ *******************************************************************************/
+package org.eclipse.jdt.annotation;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.PARAMETER;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Qualifier for a type in a method signature or a local variable declaration:
+ * The entity (return value, parameter, field, local variable) whose type has this
+ * annotation is allowed to have the value <code>null</code> at runtime.
+ * <p>
+ * This has two consequences:
+ * <ul>
+ * <li>Binding a <code>null</code> value to the entity is legal.</li>
+ * <li>Dereferencing the entity is unsafe, i.e., a <code>NullPointerException</code> can occur at runtime.</li>
+ * </ul>
+ * </p>
+ * @since 1.0
+ */
+@Documented
+@Retention(RetentionPolicy.CLASS)
+@Target({ FIELD, METHOD, PARAMETER, LOCAL_VARIABLE })
+public @interface Nullable {
+    // marker annotation with no members
+}