add comments and adjust formatting

src/itdelatrisu/opsu/Container.java

@@ -133,7 +133,7 @@ public class Container extends AppGameContainer {
 		// reset BeatmapSetList data
 		if (BeatmapSetList.get() != null)
 			BeatmapSetList.get().reset();
-		
+
 		// delete OpenGL objects involved in the Curve rendering
 		CurveRenderState.shutdown();
 	}

src/itdelatrisu/opsu/render/CurveRenderState.java

@@ -75,7 +75,12 @@ public class CurveRenderState {
 		//scale = scale * 118 / 128; //for curves exactly as big as the sliderball
 		FrameBufferCache.init(width, height);
 	}
-	
+
+	/**
+	 * Undo the static state. Static state setup caused by calls to 
+	 * {@link #draw(org.newdawn.slick.Color, org.newdawn.slick.Color, itdelatrisu.opsu.objects.curves.Vec2f[])}
+	 * are undone.
+	 */
 	public static void shutdown()
 	{
 		staticState.shutdown();
@@ -144,7 +149,7 @@ public class CurveRenderState {
 	}
 
 	/**
-	 * Discard the cache.
+	 * Discard the cache mapping for this curve object
 	 */
 	public void discardCache() {
 		fbo = null;
@@ -454,14 +459,17 @@ public class CurveRenderState {
 			}
 		}
 
+		/**
+		 * Cleanup any OpenGL objects that may have been initialized.
+		 */
 		private void shutdown()
 		{
 			if(gradientTexture != 0)
 			{
-			GL11.glDeleteTextures(gradientTexture);
-			gradientTexture = 0;
+				GL11.glDeleteTextures(gradientTexture);
+				gradientTexture = 0;
 			}
-			
+
 			if(program != 0)
 			{
 				GL20.glDeleteProgram(program);

src/itdelatrisu/opsu/render/FrameBufferCache.java

@@ -122,11 +122,14 @@ public class FrameBufferCache {
 		return buffer;
 	}
 
+	/**
+	 * Clear the cache pool of Framebuffers.
+	 * If there were any previous Framebuffers in the cache delete them
+	 * this is necessary for cases when the game gets re-started with a
+	 * different resolution without closing the process
+	 */
 	public static void shutdown()
 	{
-		//if there were any previous Framebuffers in the cache delete them
-		//this is necessary for cases when the game gets re-started with a
-		//different resolution without closing the process
 		FrameBufferCache fbcInstance = FrameBufferCache.getInstance();
 		for(Rendertarget target: fbcInstance.cache)
 		{

src/itdelatrisu/opsu/render/Rendertarget.java

@@ -40,7 +40,7 @@ public class Rendertarget {
 
 	/** The renderbuffer ID for the depth buffer that this rendertarget renders into. */
 	private final int depthBufferID;
-	
+
 	/**
 	 * Create a new FBO.
 	 * @param width the width
@@ -115,7 +115,7 @@ public class Rendertarget {
 
 		return buffer;
 	}
-	
+
 	/**
 	 * Destroy the OpenGL objects associated with this Rendertarget. Do not try
 	 * to use this rendertarget with OpenGL after calling this method.