Responsibility for shutting down the ExecutorService

[Antoher0101]

How should executor threads be stopped? On tomcat 7, the threads do not stop and do not allow it to end its work.

yarg/core/modules/core/src/com/haulmont/yarg/formatters/impl/doc/connector/OfficeIntegration.java

Line 30 in 7bddb7e

 protected final ExecutorService executor;