To post data to TRCC using EMA Java, EMA Java which supports Encrypted Connection type is need. The latest package, Elektron-SDK1.1.1.java.eload, does not support this connection type so it cannot be used to post data to TRCC. Fortunately, EMA is open source and the source code which supports Encrypted Connection type is available on thomsonreuters/Elektron-SDKGithub already. This mentions in EMA_Configuration_Guide on Thomson Reuters Developers Community
To build the EMA libraries from the source code, please refer to README.md under Java folder on the thomsonreuters/Elektron-SDKGithub. Set the application uses RSSL_ENCRYPTED ChannelType in EmaConfig.xml. Unfortunately, EMA Java example to Post data to TR Contribution Channel is not available currently. Please refer to EMAConsumer - Posting data to TR Contribution Channel in EMA C++ tutorial for how to implement EMA Java application to post data to TRCC.