diff --git a/repositories/src/main/java/org/dukecon/server/repositories/doag/DoagDataExtractor.groovy b/repositories/src/main/java/org/dukecon/server/repositories/doag/DoagDataExtractor.groovy
index 9499bb40..729cf85f 100644
--- a/repositories/src/main/java/org/dukecon/server/repositories/doag/DoagDataExtractor.groovy
+++ b/repositories/src/main/java/org/dukecon/server/repositories/doag/DoagDataExtractor.groovy
@@ -42,6 +42,7 @@ class DoagDataExtractor implements ConferenceDataExtractor, ApplicationContextAw
 //    }
 
     DoagDataExtractor(ConferencesConfiguration.Conference config, RawDataMapper rawDataMapper, SpeakerImageService speakerImageService) {
+        log.debug ("Extracting data for '{}'", config)
         this.conferenceId = config.id
         this.rawDataMapper = rawDataMapper
         this.startDate = config.startDate
@@ -67,7 +68,7 @@ class DoagDataExtractor implements ConferenceDataExtractor, ApplicationContextAw
     }
 
     Conference buildConference() {
-        log.debug("Building conferences '{}' (name: {}, url: {})", conferenceId, conferenceName, conferenceUrl)
+        log.debug("Building conference '{}' (name: {}, url: {})", conferenceId, conferenceName, conferenceUrl)
         this.rawDataMapper.initMapper()
         this.talksJson = this.rawDataMapper.asMap().eventsData
         this.speakersJson = this.rawDataMapper.asMap().speakersData
diff --git a/repositories/src/main/java/org/dukecon/server/repositories/heise/HeiseDataExtractor.groovy b/repositories/src/main/java/org/dukecon/server/repositories/heise/HeiseDataExtractor.groovy
index 36937c54..4c7157fb 100644
--- a/repositories/src/main/java/org/dukecon/server/repositories/heise/HeiseDataExtractor.groovy
+++ b/repositories/src/main/java/org/dukecon/server/repositories/heise/HeiseDataExtractor.groovy
@@ -1,5 +1,6 @@
 package org.dukecon.server.repositories.heise
 
+import groovy.util.logging.Slf4j
 import org.dukecon.model.Conference
 import org.dukecon.server.repositories.ConferenceDataExtractor
 import org.dukecon.server.repositories.RawDataMapper
@@ -13,12 +14,14 @@ import java.time.LocalDate
  *
  * @author Falk Sippach, falk@jug-da.de, @sippsack
  */
+@Slf4j
 class HeiseDataExtractor implements ConferenceDataExtractor {
 
     final Conference conference
     private SpeakerImageService speakerImageService
 
     HeiseDataExtractor(ConferencesConfiguration.Conference config, RawDataMapper rawDataMapper, SpeakerImageService speakerImageService) {
+        log.debug ("Extracting data for '{}'", config)
         this.speakerImageService = speakerImageService
         this.conference = fromInput(getInput(rawDataMapper), config.startDate, config.id, config.name, config.url)
     }