Update docs for ESWrapper

src/main/kotlin/helpers/ElasticSearchWrapper.kt

@@ -38,19 +38,8 @@ class ElasticSearchWrapper(settings: Properties) {
     /**
      * Establishes a connection to the client and ensures, that the index is present. The index may be an alias
      * or an index directly.
-     *
-     * If the connection fails or the index does not exists, no client is created. When this happens all
-     * functions will be returning default values instead of executing the query.
-     *
-     * The service needs to be restarted to establish a new connection. It is reported within the logs that
-     * there is no successful connection.
-     *
-     * This makes it easier to test this service, and ensures that it keeps running even if elasticsearch is not
-     * available.
-     *
-     * TODO: In the future find a better solution.
      */
-    fun connect(): RestHighLevelClient? {
+    private fun connect(): RestHighLevelClient? {
         return try {
             val c = RestHighLevelClient(
                 RestClient.builder(
@@ -78,6 +67,10 @@ class ElasticSearchWrapper(settings: Properties) {
 
     /**
      * Counts the number of documents attached to a specific record set.
+     *
+     * @param recordSetIdentifier The memobase identifier of the record set.
+     *
+     * @return Number of Documents
      */
     fun countNumberOfDocuments(recordSetIdentifier: String): Int {
         if (client == null)
@@ -108,7 +101,12 @@ class ElasticSearchWrapper(settings: Properties) {
     }
 
     /**
-     * Counts the number of documents attached to a specific record set.
+     * Collects all the document types present in the index for a specific record set.
+     *
+     * @param recordSetIdentifier: The memobase identifier of the record set.
+     * @param queryField: Name of the field the identifier is stored in.
+     *
+     * @return A list of unique document type facet containers.
      */
     fun getDocumentTypesFromRecords(recordSetIdentifier: String, queryField: String): List<FacetContainer> {
         if (client == null)