--- /dev/null
+package org.o.ran.oam.nf.oam.adopter.pm.rest.manager.api;
+
+import io.reactivex.rxjava3.core.Single;
+import java.time.ZoneId;
+import java.util.zip.ZipInputStream;
+import org.eclipse.jdt.annotation.NonNull;
+import org.o.ran.oam.nf.oam.adopter.pm.rest.manager.pojos.Adapter;
+
+public interface HttpRestClient {
+ @NonNull Single<ZipInputStream> readFiles(@NonNull Adapter adapter);
+
+ @NonNull Single<ZoneId> getTimeZone(@NonNull Adapter adapter);
+}