embed a custom live template in a plugin Follow

Hallo,
in my custom language plugin I want to provide live templates. I tried it the following way: I created my template via the settings-editor. The created xml looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<templateSet group="user">

    <template name="create property" value="$PROPERTY_TYPE$ $PROPERTY_NAME$ {&#10;    $END$&#10;}" description="creates the stub for a new property" toReformat="false" toShortenFQNames="true">
        <variable name="PROPERTY_TYPE" expression="enum(&quot;BOOLEAN NOT_COMPARABLE&quot;,&quot;BOOLEAN AVAILABILITY&quot;,&quot;INTEGER MORE_IS_BETTER&quot;, &quot;INTEGER LESS_IS_BETTER&quot;,&quot;DOUBLE MORE_IS_BETTER&quot;, &quot;DOUBLE LESS_IS_BETTER&quot;,&quot;STRING NOT_COMPARABLE&quot;,&quot;STRING_ENUM AVIALABILITY&quot;, &quot;STRING_ENUM RICHNESS&quot;)" defaultValue="&quot;STRINGENUM NOT_COMPARABLE&quot;" alwaysStopAt="true" />
        <variable name="PROPERTY_NAME" expression="" defaultValue="&quot;PROPERTY_NAME&quot;" alwaysStopAt="true" />
        <context>
            <option name="sol" value="true" />
        </context>
    </template>
</templateSet>

I stored the generated xml in my plugin project under %project%/resources/liveTemplate/user.xml

Then I implemented a DefaultLiveTemplateProvider:

public class SOLTemplateProvider implements DefaultLiveTemplatesProvider{
    @Override
    public String[] getDefaultLiveTemplateFiles() {
        return new String[] {"resources/liveTemplates/user"};
    }

    @Nullable
    @Override
    public String[] getHiddenLiveTemplateFiles() {
        return new String[] {};
    }
}
 

I used this extension point to register the provider:
<defaultLiveTemplatesProvider implementation="com.sol.SOLTemplateProvider"/>

In my plugin project I then created the template context with this implementation:

public class SOLTemplateContextProvider extends TemplateContextType{

    protected SOLTemplateContextProvider() {
        super("SOLTemplates", "sol");
    }
    @Override
    public boolean isInContext(@NotNull PsiFile file, int offset) {
        return true;
    }
}

And I used this extension point to register my TemplateContext:

<liveTemplateContext implementation="com.sol.SOLTemplateContextProvider"/>

I hoped that's all I needed to embed the live template in my plugin. However when I started the plugin the template can not be used and is not listed in the settings editor.
Have I forgot something or is this the wrong way to accomplish this?

Thanks for any help, Sebastian