Update codeSnippets.md

Author: reuschling

codeSnippets.md

@@ -58,6 +58,12 @@
     System.out.println(reportContentHandler.getReport());
 
 **Create a Lucene index**
+
+    **CAUTION**: We ship a LuceneContentHandler for `Lucene 6.4.2`, the maven dependency is NOT per default in the 
+    pom.xml (marked as provided). We made this choice to get independent from the Lucene dependency. If you want to 
+    use the LuceneContentHandler for `Lucene 6.4.2`, add maven dependencies for `lucene-core`,
+    `lucene-analyzers-common` and `lucene-queryparser`. It is also just easy to implement an own Lucene data sink by
+    implementing a DataSinkContentHandler/DataSinkContentHandlerAdapter.
       
     // we use a simple, preconfigured Field configuration here. Modify it for your own fields if necessary
     FieldConfig fieldConfig4Wikipedia = WikipediaDumpParser.getFieldConfig4ParserAttributes();