additionally support oracle. Reintegrate postgreSQL.

src/main/asciidoc/architectureDocumentation/elogbook_architectureDocumentation.adoc

diff --git a/src/main/asciidoc/architectureDocumentation/elogbook_architectureDocumentation.adoc b/src/main/asciidoc/architectureDocumentation/elogbook_architectureDocumentation.adoc
index 65fa673..4b4c2f6 100644
--- a/src/main/asciidoc/architectureDocumentation/elogbook_architectureDocumentation.adoc
+++ b/src/main/asciidoc/architectureDocumentation/elogbook_architectureDocumentation.adoc
@@ -681,13 +681,16 @@
 {
   "portalBaseURL" : "http://{hostname}:{port}/portal/rest/beservice",
   "fileRowToRead": "9",
-  "importFilesFolderPath": "/home/btbservice/importFiles"
+  "importFilesFolderPath": "/home/btbservice/importFiles",
+  "activePersistencyUnit": "betriebstagebuchORA"
 }
 ----
 * *portalBaseURL* - The portal base url should point the the address where the portal backend (the *Auth&Auth*-Server)
                     can be accessed. This is important for the authorization of the backend services.
 * *fileRowToRead* - Defines the line number inside the import-file of the relevant text line.
 * *importFilesFolderPath* - Defines the exchange directory for the import functionality
+* *activePersistencyUnit* - Defines the active part of the file persistenc.xml. Choose *"betriebstagebuchORA"* for the
+                    usage of OracleDB and *"betriebstagebuch"* to use PostgreSQL.
 
 
 === CI- and CD-Components