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Wildfly 11 is using Hibernate 5.1.x.
The MariaDB Dialect was introduced later in Hibernate 5.2.x. See java - What is the MariaDB dialect class name for Hibernate? - Stack Overflow
There you also can find a solution for your problem (use org.hibernate.dialect.MySQL5InnoDBDialect).
Thanks for the reply.
I followed the instructions from this site: Updating Hibernate ORM in WildFly - In Relation To and updated Hibernate to 5.2.11 and all is working well now with the org.hibernate.dialect.MariaDB53Dialect