Add documantation how to add support for a new language

src/main/pages/che-7/contributor-guide/proc_adding-support-for-a-new-language.adoc

@@ -1,27 +1,32 @@
 [id="adding-support-for-a-new-language_{context}"]
 = Adding support for a new language
 
-This paragraph is the procedure module introduction: a short description of the procedure.
+This section describes how to add support for a new language into Eclipse Che. 
 
-[discrete]
-== Prerequisites
+The described method is to writer a Che-Theia plug-in that uses the _languageserver-node_ library to connect a language server to the VS Code extension API. Note that it is also possible to directly connect a Che-Theia plug-in or a VS Code extension to the plug-in API. 
 
-* A bulleted list of conditions that must be satisfied before the user starts following this assembly.
-* You can also link to other modules or assemblies the user must follow before starting this assembly.
-* Delete the section title and bullets if the assembly has no prerequisites.
+.Prerequisites
+* Install the latest Che-Theia plug-in Yeoman generator. Follow the documentation about link:developing-che-theia-plug-ins.html#bootstrapping-che-theia-plug-in-development-with-yeoman_developing-che-theia-plug-ins[how to develop Che-Theia plug-in with Yeoman.]
+
+.Procedure
 
-[discrete]
-== Procedure
+. Generate a sample by running the `yo @theia/plugin` command. When prompted, confirm the choices for *Backend plug-in*, *Samples*, and then *Language sample*. This creates a project and a ready-to-use plug-in, which provides support for XML Language Server and can be deployed.
 
-. Start each step with an active verb.
+. Replace the download URL of the implementation of the language server protocol in the `src/download-xml-ls.js` file. This file will be downloaded during the build process of the plug-in. If the name of `src/download-xml-ls.js` changed, replace it in the `package.json` file in the `scripts` block.
 
-. Include one command or action per step.
+. Replace the configuration of the language in the `src/language-configuration.json` file. This file contains configuration options for the current language. If the name of `src/language-configuration.json` changed, replace it in the `package.json` file in the `contribution` block.
 
-. Use an unnumbered bullet (*) if the procedure includes only one step.
+. Replace the configuration of the language in the `src/xml.tmLanguage.json` file. This file describes syntax highlighting. If the name of `src/xml.tmLanguage.json` changed, replace it in the `package.json` file in the `contribution.grammars` block.
 
-[discrete]
-== Additional resources
+. Replace the information about the provided language in the `src/plug-in_name.ts` file. This file contains information about the location of the Language Server Protocol (LSP) implementation and the command with arguments to run it.
 
-* A bulleted list of links to other material closely related to the contents of the procedure module.
-* For more details on writing procedure modules, see the link:https://github.com/redhat-documentation/modular-docs#modular-documentation-reference-guide[Modular Documentation Reference Guide].
-* Use a consistent system for file names, IDs, and titles. For tips, see _Anchor Names and File Names_ in link:https://github.com/redhat-documentation/modular-docs#modular-documentation-reference-guide[Modular Documentation Reference Guide].
+. Build the plug-in by running `yarn` in the root of the project.
+
+
+.Additional resources
+
+* link:https://github.com/eclipse/che-theia-samples/tree/master/samples/xml-language-server-plugin[Theia plug-in with XML Language Server]
+* link:https://microsoft.github.io/language-server-protocol/[Language Server Protocol]
+* link:https://code.visualstudio.com/api/language-extensions/overview[VS Code Language Extensions Documentation]
+* link:https://code.visualstudio.com/api/language-extensions/language-server-extension-guide[A simple Language Server for plain text files]
+* link:publishing-che-theia-plug-ins.html#adding-a-che-theia-plug-in-to-the-che-plug-in-registry_publishing-che-theia-plug-ins[Add the plug-in to the Che plug-in registry.]