diff --git a/src/ol/kinetic.js b/src/ol/kinetic.js
index 9cfcfcd991..0960f81ca4 100644
--- a/src/ol/kinetic.js
+++ b/src/ol/kinetic.js
@@ -7,6 +7,9 @@ goog.require('ol.animation');
 
 
 /**
+ * @classdesc
+ * Implementation of inertial deceleration for map movement.
+ *
  * @constructor
  * @param {number} decay Rate of decay (must be negative).
  * @param {number} minVelocity Minimum velocity (pixels/millisecond).
diff --git a/src/ol/render/canvas/canvasimmediate.js b/src/ol/render/canvas/canvasimmediate.js
index 6d677a894f..f9ce406d53 100644
--- a/src/ol/render/canvas/canvasimmediate.js
+++ b/src/ol/render/canvas/canvasimmediate.js
@@ -19,6 +19,14 @@ goog.require('ol.vec.Mat4');
 
 
 /**
+ * @classdesc
+ * A concrete subclass of {@link ol.render.IVectorContext} that implements
+ * direct rendering of features and geometries to an HTML5 Canvas context.
+ * Instances of this class are created internally by the library and
+ * provided to application code as vectorContext member of the
+ * {@link ol.render.Event} object associated with postcompose, precompose and
+ * render events emitted by layers and maps.
+ *
  * @constructor
  * @implements {ol.render.IVectorContext}
  * @param {CanvasRenderingContext2D} context Context.
diff --git a/src/ol/tile.js b/src/ol/tile.js
index 9d2d068caa..d3b4094841 100644
--- a/src/ol/tile.js
+++ b/src/ol/tile.js
@@ -23,6 +23,9 @@ ol.TileState = {
 
 
 /**
+ * @classdesc
+ * Base class for tiles.
+ *
  * @constructor
  * @extends {goog.events.EventTarget}
  * @param {ol.TileCoord} tileCoord Tile coordinate.
diff --git a/src/ol/tilecoord.js b/src/ol/tilecoord.js
index 8e48cf97b9..a521630542 100644
--- a/src/ol/tilecoord.js
+++ b/src/ol/tilecoord.js
@@ -17,6 +17,9 @@ ol.QuadKeyCharCode = {
 
 
 /**
+ * @classdesc
+ * Represents the location of a tile in a tile grid.
+ *
  * @constructor
  * @param {number} z Zoom level.
  * @param {number} x X.
diff --git a/src/ol/webgl/context.js b/src/ol/webgl/context.js
index b52ac46c28..307837dc66 100644
--- a/src/ol/webgl/context.js
+++ b/src/ol/webgl/context.js
@@ -19,6 +19,9 @@ ol.webgl.BufferCacheEntry;
 
 
 /**
+ * @classdesc
+ * A WebGL context for accessing low-level WebGL capabilities.
+ *
  * @constructor
  * @extends {goog.events.EventTarget}
  * @param {HTMLCanvasElement} canvas Canvas.