Added basic typing structure

src/main/java/de/hsrm/compiler/Klang/types/IntegerType.java

@@ -0,0 +1,20 @@
+package de.hsrm.compiler.Klang.types;
+
+public class IntegerType extends PrimitiveType {
+
+  private static IntegerType instance = null;
+
+  public static IntegerType getType() {
+    if (instance != null) {
+      return instance;
+    }
+    instance = new IntegerType();
+    return instance;
+  }
+
+  @Override
+  public boolean isIntegerType() {
+    return true;
+  }
+
+}

src/main/java/de/hsrm/compiler/Klang/types/PrimitiveType.java

@@ -0,0 +1,13 @@
+package de.hsrm.compiler.Klang.types;
+
+public abstract class PrimitiveType extends Type {
+
+  @Override
+  public boolean isPrimitiveType() {
+    return true;
+  }
+
+  public boolean isIntegerType() {
+    return false;
+  };
+}

src/main/java/de/hsrm/compiler/Klang/types/Type.java

@@ -0,0 +1,12 @@
+package de.hsrm.compiler.Klang.types;
+
+public abstract class Type {
+
+  // Returns an instance of IntegerType
+  // Used for adding new types to a node
+  public static IntegerType getIntegerType() {
+    return IntegerType.getType();
+  }
+
+  public abstract boolean isPrimitiveType();
+}