diff --git a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/AbstractCheckerTest.java b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/AbstractCheckerTest.java
index 6a5c4481ccbd23047ee62e0607114ac6285b9a37..261f5dea0066ee77ddd14d95b406695c36b8b8a3 100644
--- a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/AbstractCheckerTest.java
+++ b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/AbstractCheckerTest.java
@@ -26,9 +26,11 @@ import ch.systemsx.cisd.bds.storage.filesystem.NodeFactory;
 import ch.systemsx.cisd.common.utilities.OSUtilities;
 
 /**
+ * An abstract test class for the checkers.
+ * 
  * @author Izabela Adamczyk
  */
-public class AbstractCheckerTest
+public abstract class AbstractCheckerTest
 {
 
     protected final String errorFoundNotTrimmed(final String path, final String file,
diff --git a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/HCSImageCheckerTest.java b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/HCSImageCheckerTest.java
index f97a5b55eb9eb22016046f67c1ab954c086cc5ce..1afc88cc9aa0b6e19cc8c21712423b8581826f10 100644
--- a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/HCSImageCheckerTest.java
+++ b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/HCSImageCheckerTest.java
@@ -22,6 +22,11 @@ import java.io.IOException;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
+/**
+ * Test cases for corresponding {@link HCSImageChecker} class.
+ * 
+ * @author Christian Ribeaud
+ */
 public class HCSImageCheckerTest extends AbstractCheckerTest
 {
     private final boolean verbose = false;
diff --git a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/StructureCheckerTest.java b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/StructureCheckerTest.java
index a51348036bbf3bfc1cc3136bfda84685b1646590..b380ba72ca439f5a1eff74c378d651bd78e90aa7 100644
--- a/bds/sourceTest/java/ch/systemsx/cisd/bds/check/StructureCheckerTest.java
+++ b/bds/sourceTest/java/ch/systemsx/cisd/bds/check/StructureCheckerTest.java
@@ -22,6 +22,11 @@ import java.io.IOException;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
+/**
+ * Test cases for corresponding {@link StructureChecker} class.
+ * 
+ * @author Christian Ribeaud
+ */
 public class StructureCheckerTest extends AbstractCheckerTest
 {
     private final boolean verbose = false;