Start LS for docs created with appropriate content-type

eclipse-language-servers/org.springframework.tooling.cloudfoundry.manifest.ls/plugin.xml

@@ -19,10 +19,11 @@
    <extension
          point="org.eclipse.core.contenttype.contentTypes">
       <content-type
+            base-type="org.eclipse.core.runtime.text"
             default-charset="UTF-8"
+            file-names="manifest.yml"
             id="org.springframework.ide.eclipse.manifest.yml"
             name="Cloudfoundry Manifest"
-            file-names="manifest.yml"
             priority="high">
       </content-type>
       <file-association
@@ -67,4 +68,12 @@
       </scopeNameContentTypeBinding>
    </extension>
    
+   <extension
+         point="org.eclipse.core.filebuffers.documentSetup">
+      <participant
+            class="org.eclipse.lsp4e.ConnectDocumentToLanguageServerSetupParticipant"
+            contentTypeId="org.springframework.ide.eclipse.manifest.yml">
+      </participant>
+   </extension>
+
 </plugin>