Eclipse plug-in: Create a new file extension for a language not supported by Eclipse

Question

I am creating an Eclipse plug-in for it to support a new language. The problem I have is with the content type/file association and its respective editor.

The language has no base in Java or XML and let's say its extension is '.xyz'

From what I understood of research online, I would need to create a new Content Type with file extension '.xyz'. But all the information I have found online has related to either associating a new extension with java (for java syntax highlighting) or creating a new type of file which can be a variant of XML, hence having a lot of details about the describer.
Basically, I am confused about the content describer, am I also to create a new describer for a new language? And what base-type would I give for a language not related to XML or JAVA at all?

Also, since I will be adding my own syntax highlighting, would I need to create my own editor or can I just open such a file in the pre-set editorArea (editors).

The package I am looking at for content types is org.eclipse.core.contenttype.contentTypes.

Answer 1

Note: this (new language support, custom syntax highlighting, ...) is the kind of feature provided with XText.

Xtext - Language Development Framework

With Xtext you can easily create your own programming languages and domain-specific languages (DSLs).
The framework supports the development of language infrastructures including compilers and interpreters as well as full blown Eclipse-based IDE integration.

Since the sources are available, you might have a lots of clues to illustrate the usage of the packages you are currently looking.