diff --git a/java/org/slub/rosetta/dps/repository/plugin/SLUBMatroskaFFV1FormatValidationPlugin.java b/java/org/slub/rosetta/dps/repository/plugin/SLUBMatroskaFFV1FormatValidationPlugin.java
index 06e835cd4f60878f253469e393f133c1ac0a7472..ad9cdb9f98741c57e3e0c40c671c9730793c37d4 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/SLUBMatroskaFFV1FormatValidationPlugin.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/SLUBMatroskaFFV1FormatValidationPlugin.java
@@ -79,7 +79,11 @@ public class SLUBMatroskaFFV1FormatValidationPlugin implements FormatValidationP
         } catch (Exception e) {
             e.printStackTrace();
         }
-        // TODO: log.info();
+        log.info( "SLUBMatroskaFFV1FormatValidationPlgin instantiated with"
+                + " meduaconch binary=" + mediaconch_binary_path
+                + "cfg (current)=" + mediaconch_current_profile_path
+                + "cfg (upcoming)=" + mediaconch_upcoming_profile_path
+        );
     }
 
     @Override
@@ -102,7 +106,7 @@ public class SLUBMatroskaFFV1FormatValidationPlugin implements FormatValidationP
 
     private void callMediaconch(String filePath, String profilePath) {
         String execstring = this.mediaconch_binary_path + " " + filePath + " -p " + profilePath;
-        System.out.println("executing: " + execstring);
+        log.info("executing: " + execstring);
         InputStreamReader process_out;
         try {
             Process p = Runtime.getRuntime().exec(execstring);
@@ -124,13 +128,14 @@ public class SLUBMatroskaFFV1FormatValidationPlugin implements FormatValidationP
                 System.out.println("MEDIACONCH line: " + line);
                 validationLog.add(line);
                 line = reader.readLine();
+                log.info( line );
             }
             reader.close();
         } catch (IOException e) {
-            //log.error("exception creation socket, clamd not available at host=" + host + "port=" + port, e);
+            log.error("exception creation socket, clamd not available at host=" + host + "port=" + port, e);
             System.out.println("ERROR: (actual) mediaconch not available, path=" + this.mediaconch_binary_path + ", " + e.getMessage());
         } catch (InterruptedException e) {
-            System.out.println("ERROR: call of mediaconch interrupted, path=" + this.mediaconch_binary_path + ", " + e.getMessage());
+            log.error("ERROR: call of mediaconch interrupted, path=" + this.mediaconch_binary_path + ", " + e.getMessage());
         }
     }
 
@@ -199,14 +204,14 @@ public class SLUBMatroskaFFV1FormatValidationPlugin implements FormatValidationP
 
     @Override
     public final boolean isValid() {
-        //System.out.println("DEBUG: is valid=" + this.isvalid);
+        log.debug("is valid=" + this.isvalid);
         return this.isvalid;
     }
 
     private void checkFileExists (String filename) throws Exception {
         File f = new File(filename);
         if (! f.exists() ) {
-            System.out.println("ERROR: path=" + filename + " not available");
+            log.error("path=" + filename + " not available");
             throw new Exception("ERROR: path=" + filename + " not available");
         }
     }