move AutoCloseable to top level interface AbstractEngineInterface

src/java/foundation/pEp/jniadapter/AbstractEngine.java

@@ -8,7 +8,7 @@ import foundation.pEp.jniadapter.interfaces.*;
 import foundation.pEp.jniadapter.exceptions.*;
 
 
-abstract class AbstractEngine extends UniquelyIdentifiable implements AbstractEngineInterface, AutoCloseable {
+abstract class AbstractEngine extends UniquelyIdentifiable implements AbstractEngineInterface {
     static {
         System.loadLibrary("pEpJNI");
     }

src/java/foundation/pEp/jniadapter/interfaces/AbstractEngineInterface.java

@@ -3,7 +3,7 @@ package foundation.pEp.jniadapter.interfaces;
 import foundation.pEp.jniadapter.Message;
 import foundation.pEp.jniadapter.Sync;
 
-public interface AbstractEngineInterface {
+public interface AbstractEngineInterface extends AutoCloseable {
     public String getVersion();
 
     public String getProtocolVersion();