I tried to use neo v3.186.6 (for the tunnel) and a Jetbrains integrated DB viewer to access a HANA database.
Upon establishing the connection I get the error message:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/JAXBContext
You have to use Java 8, but the SAP 0002767581 note which would have told you is hidden behind a paywall and not indexed by search engines:
https://me.sap.com/notes/0002767581
You can download OpenJDK8 and then set the JAVA_HOME environment variable to the respective directory. On windows you might need to restart re-login after setting the env variable.