@returnWrapped javadoc tag leads to NPE

[lancespeelmon]

For example:
`
/**

• Get the User object by primary key.
• @http 200 User was found.
• @http 404 User could not be found.
• @param uid
• @param request
• @return a wrapped {@link User} object
• @returnWrapped com.example.User
  */

`

generates:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.1:site (default-site) on project spring-mvc-jpa: Error during page generation: Error rendering Maven report:
[ERROR] Exit code: 1 - javadoc: error - In doclet class com.lunatech.doclets.jax.jaxrs.JAXRSDoclet, method start has thrown an exception java.lang.reflect.InvocationTargetException
[ERROR] java.lang.NullPointerException
[ERROR] at com.sun.tools.javadoc.ClassDocImpl.importedClasses(ClassDocImpl.java:1032)
[ERROR] at com.lunatech.doclets.jax.Utils.resolveType(Utils.java:648)
[ERROR] at com.lunatech.doclets.jax.Utils.setupType(Utils.java:789)
[ERROR] at com.lunatech.doclets.jax.Utils.parseType(Utils.java:737)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.MethodWriter.printOutput(MethodWriter.java:163)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.MethodWriter.printMethod(MethodWriter.java:83)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.MethodWriter.print(MethodWriter.java:54)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.ResourceWriter.printMethodDetails(ResourceWriter.java:115)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.ResourceWriter.printMethods(ResourceWriter.java:68)
[ERROR] at com.lunatech.doclets.jax.jaxrs.writers.ResourceWriter.write(ResourceWriter.java:56)
[ERROR] at com.lunatech.doclets.jax.jaxrs.model.Resource.write(Resource.java:166)
[ERROR] at com.lunatech.doclets.jax.jaxrs.model.Resource.write(Resource.java:169)
[ERROR] at com.lunatech.doclets.jax.jaxrs.model.Resource.write(Resource.java:169)
[ERROR] at com.lunatech.doclets.jax.jaxrs.model.Resource.write(Resource.java:169)
[ERROR] at com.lunatech.doclets.jax.jaxrs.JAXRSDoclet.start(JAXRSDoclet.java:106)
[ERROR] at com.lunatech.doclets.jax.jaxrs.JAXRSDoclet.start(JAXRSDoclet.java:78)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:597)
[ERROR] at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
[ERROR] at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
[ERROR] at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
[ERROR] at com.sun.tools.javadoc.Start.begin(Start.java:128)
[ERROR] at com.sun.tools.javadoc.Main.execute(Main.java:41)
[ERROR] at com.sun.tools.javadoc.Main.main(Main.java:31)