Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/AssertionsInEDT.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/AssertionsInEDT.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/AssertionsInEDT.java	(revision 18972)
@@ -22,4 +22,7 @@
 @ExtendWith(AssertionsInEDT.AssertionsExtension.class)
 public @interface AssertionsInEDT {
+    /**
+     * Check for assertions in the EDT
+     */
     class AssertionsExtension implements BeforeEachCallback {
         private Runnable edtAssertionMockingRunnable = EDTAssertionMocker::new;
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/FakeImagery.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/FakeImagery.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/FakeImagery.java	(revision 18972)
@@ -114,4 +114,7 @@
     }
 
+    /**
+     * A wiremock extension for fake imagery
+     */
     class FakeImageryWireMockExtension extends WireMockExtension {
 
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/HTTPS.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/HTTPS.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/HTTPS.java	(revision 18972)
@@ -31,4 +31,7 @@
 @ExtendWith(HTTPS.HTTPSExtension.class)
 public @interface HTTPS {
+    /**
+     * Initialize HTTPS support
+     */
     class HTTPSExtension implements BeforeEachCallback {
         private static boolean initialized;
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/LayerManager.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/LayerManager.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/LayerManager.java	(revision 18972)
@@ -25,4 +25,7 @@
 @ExtendWith(LayerManager.LayerManagerExtension.class)
 public @interface LayerManager {
+    /**
+     * Clean the layer environment
+     */
     class LayerManagerExtension implements BeforeEachCallback, AfterEachCallback {
         @Override
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/Logging.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/Logging.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/Logging.java	(revision 18972)
@@ -14,4 +14,7 @@
 @Target({ElementType.TYPE, ElementType.METHOD})
 public @interface Logging {
+    /**
+     * Set up loggers for testing
+     */
     class LoggingExtension implements BeforeEachCallback {
 
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MapPaintStyles.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MapPaintStyles.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MapPaintStyles.java	(revision 18972)
@@ -26,4 +26,7 @@
 @ExtendWith(MapPaintStyles.MapPaintStylesExtension.class)
 public @interface MapPaintStyles {
+    /**
+     * Set up the default paintstyles
+     */
     class MapPaintStylesExtension implements BeforeEachCallback {
         private static int lastHashcode;
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MeasurementSystem.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MeasurementSystem.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/MeasurementSystem.java	(revision 18972)
@@ -42,4 +42,7 @@
     String value() default "Metric";
 
+    /**
+     * Set up the system of measurement
+     */
     class SystemOfMeasurementExtension implements BeforeEachCallback {
         @Override
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/OsmApi.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/OsmApi.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/OsmApi.java	(revision 18972)
@@ -31,4 +31,8 @@
 public @interface OsmApi {
     APIType value() default APIType.NONE;
+
+    /**
+     * The API type to set up
+     */
     enum APIType {
         /** Don't use any API */
@@ -40,4 +44,7 @@
     }
 
+    /**
+     * Set up {@link org.openstreetmap.josm.io.OsmApi} for testing
+     */
     class OsmApiExtension implements BeforeAllCallback, BeforeEachCallback, AfterEachCallback {
         @Override
Index: trunk/test/unit/org/openstreetmap/josm/testutils/annotations/ProjectionNadGrids.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/testutils/annotations/ProjectionNadGrids.java	(revision 18965)
+++ trunk/test/unit/org/openstreetmap/josm/testutils/annotations/ProjectionNadGrids.java	(revision 18972)
@@ -28,4 +28,7 @@
 @ExtendWith(ProjectionNadGrids.NadGridsExtension.class)
 public @interface ProjectionNadGrids {
+    /**
+     * Set up the NAD grids for testing
+     */
     class NadGridsExtension implements BeforeEachCallback {
         @Override