Added support for the Packages API (#317).

src/main/java/org/gitlab4j/api/GitLabApi.java

@@ -67,6 +67,7 @@ public class GitLabApi {
     private NamespaceApi namespaceApi;
     private NotesApi notesApi;
     private NotificationSettingsApi notificationSettingsApi;
+    private PackagesApi packagesApi;
     private PipelineApi pipelineApi;
     private ProjectApi projectApi;
     private ProtectedBranchesApi protectedBranchesApi;
@@ -1141,6 +1142,25 @@ public class GitLabApi {
         return (notificationSettingsApi);
     }
 
+    /**
+     * Gets the PackagesApi instance owned by this GitLabApi instance. The PackagesApi is used
+     * to perform all Package related API calls.
+     *
+     * @return the PackagesApi instance owned by this GitLabApi instance
+     */
+    public PackagesApi getPackagesApi() {
+
+        if (packagesApi == null) {
+            synchronized (this) {
+                if (packagesApi == null) {
+                    packagesApi = new PackagesApi(this);
+                }
+            }
+        }
+
+        return (packagesApi);
+    }
+
     /**
      * Gets the PipelineApi instance owned by this GitLabApi instance. The PipelineApi is used
      * to perform all pipeline related API calls.

src/test/java/org/gitlab4j/api/TestGitLabApiBeans.java

@@ -60,6 +60,8 @@ import org.gitlab4j.api.models.Milestone;
 import org.gitlab4j.api.models.Note;
 import org.gitlab4j.api.models.NotificationSettings;
 import org.gitlab4j.api.models.OauthTokenResponse;
+import org.gitlab4j.api.models.Package;
+import org.gitlab4j.api.models.PackageFile;
 import org.gitlab4j.api.models.Pipeline;
 import org.gitlab4j.api.models.PipelineSchedule;
 import org.gitlab4j.api.models.Project;
@@ -204,6 +206,18 @@ public class TestGitLabApiBeans {
         assertTrue(compareJson(discussions, "merge-request-discussions.json"));
     }
 
+    @Test
+    public void testPackages() throws Exception {
+        List<Package> packages = unmarshalResourceList(Package.class, "packages.json");
+        assertTrue(compareJson(packages, "packages.json"));
+    }
+
+    @Test
+    public void testPackageFiles() throws Exception {
+        List<PackageFile> packageFiles = unmarshalResourceList(PackageFile.class, "package-files.json");
+        assertTrue(compareJson(packageFiles, "package-files.json"));
+    }
+
     @Test
     public void testSnippetDiscussions() throws Exception {
         List<Discussion> discussions = unmarshalResourceList(Discussion.class, "snippet-discussions.json");