3 files changed, 65 insertions, 23 deletions

diff --git a/src/de/podfetcher/util/Converter.java b/src/de/podfetcher/util/Converter.java
index fcf91015b..262debe51 100644
--- a/src/de/podfetcher/util/Converter.java
+++ b/src/de/podfetcher/util/Converter.java
@@ -2,29 +2,51 @@ package de.podfetcher.util;
 
 import android.util.Log;
 
-/** Provides methods for converting various units */
-public class Converter {
+/** Provides methods for converting various units. */
+public final class Converter {
+	/** Class shall not be instantiated. */
+	private Converter() {
+	}
+
+	/** Logging tag. */
 	private static final String TAG = "Converter";
 
-	public static String byteToString(long input) {
+
+	/** Indicates that the value is in the Byte range.*/
+	private static final int B_RANGE = 0;
+	/** Indicates that the value is in the Kilobyte range.*/
+	private static final int KB_RANGE = 1;
+	/** Indicates that the value is in the Megabyte range.*/
+	private static final int MB_RANGE = 2;
+	/** Indicates that the value is in the Gigabyte range.*/
+	private static final int GB_RANGE = 3;
+	/** Determines the length of the number for best readability.*/
+	private static final int NUM_LENGTH = 1000;
+
+	/** Takes a byte-value and converts it into a more readable
+	 *	String.
+	 *	@param input The value to convert
+	 *	@return The converted String with a unit
+	 * */
+	public static String byteToString(final long input) {
 		int i = 0;
 		int result = 0;
 
-		for(i = 0; i < 4; i++) {
+		for (i = 0; i < GB_RANGE + 1; i++) {
 			result = (int) (input / Math.pow(1024, i));
-			if(result < 1000) {
+			if (result < NUM_LENGTH) {
 				break;
 			}
 		}
 
-		switch(i) {
-			case 0:
+		switch (i) {
+			case B_RANGE:
 				return result + " B";
-			case 1:
+			case KB_RANGE:
 				return result + " KB";
-			case 2:
+			case MB_RANGE:
 				return result + " MB";
-			case 3:
+			case GB_RANGE:
 				return result + " GB";
 			default:
 				Log.e(TAG, "Error happened in byteToString");
diff --git a/src/de/podfetcher/util/NumberGenerator.java b/src/de/podfetcher/util/NumberGenerator.java
index 81220820a..2ffefbbaa 100644
--- a/src/de/podfetcher/util/NumberGenerator.java
+++ b/src/de/podfetcher/util/NumberGenerator.java
@@ -3,11 +3,21 @@ package de.podfetcher.util;
 import java.util.Random;
 import android.util.Log;
 
-/** Utility class for creating large random numbers */
-public class NumberGenerator {
+/**Utility class for creating large random numbers.*/
+public final class NumberGenerator {
+	/** Class shall not be instantiated.*/
+	private NumberGenerator() {
+	}
+
+	/**Logging tag.*/
     private static final String TAG = "NumberGenerator";
 
-    public static long generateLong(String strSeed) {
+	/** Takes a string and generates a random value out of
+	 * the hash-value of that string.
+	 *	@param strSeed The string to take for the return value
+	 *	@return The generated random value
+	 * */
+    public static long generateLong(final String strSeed) {
         long seed = (long) strSeed.hashCode();
         Log.d(TAG, "Taking " + seed + " as seed.");
         return new Random(seed).nextLong();
diff --git a/src/de/podfetcher/util/URLChecker.java b/src/de/podfetcher/util/URLChecker.java
index e8916f06a..f862b03a9 100644
--- a/src/de/podfetcher/util/URLChecker.java
+++ b/src/de/podfetcher/util/URLChecker.java
@@ -1,29 +1,39 @@
 package	de.podfetcher.util;
 
-import android.webkit.URLUtil;
 import android.util.Log;
 
-/** Provides methods for checking and editing a URL */
-public class URLChecker {
+/** Provides methods for checking and editing a URL.*/
+public final class URLChecker {
 
-	private static final String TAG = "URLChecker";	
+	/**Class shall not be instantiated.*/
+	private URLChecker() {
+	}
+
+	/**Logging tag.*/
+	private static final String TAG = "URLChecker";
+	/**Indicator for URLs made by Feedburner.*/
 	private static final String FEEDBURNER_URL = "feeds.feedburner.com";
+	/**Prefix that is appended to URLs by Feedburner.*/
 	private static final String FEEDBURNER_PREFIX = "?format=xml";
 
-	/** Checks if URL is valid and modifies it if necessary */
-	public static String prepareURL(String url) {
+	/** Checks if URL is valid and modifies it if necessary.
+	 *	@param url The url which is going to be prepared
+	 *	@return The prepared url
+	 * */
+	public static String prepareURL(final String url) {
 		StringBuilder builder = new StringBuilder();
 
-		if(!url.startsWith("http")) {
+		if (!url.startsWith("http")) {
 			builder.append("http://");
 			Log.d(TAG, "Missing http; appending");
 		}
 		builder.append(url);
 
-		if(url.contains(FEEDBURNER_URL)) {
-			Log.d(TAG, "URL seems to be Feedburner URL; appending prefix");
+		if (url.contains(FEEDBURNER_URL)) {
+			Log.d(TAG,
+			"URL seems to be Feedburner URL; appending prefix");
 			builder.append(FEEDBURNER_PREFIX);
 		}
-		return builder.toString();	
+		return builder.toString();
 	}
 }