service.api: fix build in Java 11
diff --git a/plugins-server/org.hawk.service.api/META-INF/MANIFEST.MF b/plugins-server/org.hawk.service.api/META-INF/MANIFEST.MF
index 1a640df..8ada53e 100644
--- a/plugins-server/org.hawk.service.api/META-INF/MANIFEST.MF
+++ b/plugins-server/org.hawk.service.api/META-INF/MANIFEST.MF
@@ -10,6 +10,7 @@
  org.apache.httpcomponents.httpclient;bundle-version="4.3.6";resolution:=optional,
  org.apache.httpcomponents.httpcore;bundle-version="4.3.3";resolution:=optional,
  org.hawk.service.artemis;bundle-version="1.0.0",
- com.google.guava;bundle-version="15.0.0"
+ com.google.guava;bundle-version="15.0.0",
+ javax.annotation;bundle-version="1.2.0"
 Export-Package: org.hawk.service.api,
  org.hawk.service.api.utils
diff --git a/plugins-server/org.hawk.service.api/pom-plain.xml b/plugins-server/org.hawk.service.api/pom-plain.xml
index 93b93b0..dfa3fb4 100644
--- a/plugins-server/org.hawk.service.api/pom-plain.xml
+++ b/plugins-server/org.hawk.service.api/pom-plain.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.eclipse.hawk</groupId>
@@ -37,24 +37,28 @@
       </plugin>
     </plugins>
   </build>
-  
+
   <dependencies>
-	<dependency>
-    <groupId>com.google.guava</groupId>
-    <artifactId>guava</artifactId>
-    <version>15.0</version> 
-	</dependency>
-	
     <dependency>
-	    <groupId>org.apache.thrift</groupId>
-	    <artifactId>libthrift</artifactId>
-	    <version>0.9.3</version>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>15.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.thrift</groupId>
+      <artifactId>libthrift</artifactId>
+      <version>0.9.3</version>
     </dependency>
     <dependency>
       <groupId>org.eclipse.hawk.service</groupId>
       <artifactId>org.eclipse.hawk.service.artemis</artifactId>
       <version>1.2.0-SNAPSHOT</version>
     </dependency>
+    <dependency>
+      <groupId>javax.annotation</groupId>
+      <artifactId>javax.annotation-api</artifactId>
+      <version>1.3.2</version>
+    </dependency>
   </dependencies>
 
 </project>