Added javax.annotation-api dependency to pom-plain.xml

pom-plain.xml

diff --git a/pom-plain.xml b/pom-plain.xml
index 76068cf..1dad217 100644
--- a/pom-plain.xml
+++ b/pom-plain.xml
@@ -72,6 +72,11 @@
   -->
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>javax.annotation</groupId>
+        <artifactId>javax.annotation-api</artifactId>
+        <version>1.3.2</version>
+      </dependency>
       <!-- SWT / JFace -->
       <dependency>
         <groupId>org.eclipse.platform</groupId>