GWT Webapp + MySQL + Java Hibernate (help with basic setup)

Hi therei need some help with setting up the connection between a GWT app and a MySql Database. When running standalone Java Apps, I can connect to the Database. Only when the Webapp (via Eclipse) is calling the Java App, which should connect to the MySQL DB, I keep getting this error: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.