Add a frequency analyzer as a stub.

src/main/java/cipher_analytical_machine/analizers/caesar/FrequencyAnalyzer.java

@@ -0,0 +1,23 @@
+package cipher_analytical_machine.analizers.caesar;
+
+import cipher_analytical_machine.ciphers.caesar.Decrypted;
+import java.util.Map;
+
+public class FrequencyAnalyzer {
+    private String ciphertext;
+    private int key;
+    private String symbols;
+    private Decrypted decryptor;
+
+    public FrequencyAnalyzer(String ciphertext, String symbols, Map<Character, Double> symbol_frequences, Decrypted decryptor) {
+	this.ciphertext = ciphertext;
+	this.key = 1;
+	this.symbols = symbols;
+	this.decryptor = decryptor;
+    }
+
+    public String crack() {
+	return decryptor.decrypt(ciphertext, key, symbols);
+    }
+}
+