Added documentation to class TextLogik.

src/TextLogik.java

@@ -4,6 +4,11 @@ public class TextLogik {
     private final Text text;
     private final TextOutput textOutput;
 
+    /**
+     * Initiates a new instance of the class TextLogik.
+     * Contains command instructions for the class Text.
+     * Defined the different cases and appointed to specific commands.
+     */
     public TextLogik() {
         text = new Text();
         textOutput = new TextOutput();
@@ -79,6 +84,12 @@ public class TextLogik {
         } while (!"EXIT".equals(command[0]));
     }
 
+    /**
+     * Method to check if a command is numeric.
+     *
+     * @param str command that should be a number.
+     * @return true if the given str matches.
+     */
     private boolean isNumeric(String str) {
         return str.matches("\\d+");
     }