Initial commit (#241).

src/main/java/org/gitlab4j/api/models/Artifact.java

+package org.gitlab4j.api.models;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+
+import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+@XmlRootElement
+@XmlAccessorType(XmlAccessType.FIELD)
+public class Artifact {
+
+    public enum FileType {
+        ARCHIVE, METADATA, TRACE, JUNIT;
+
+        private static JacksonJsonEnumHelper<FileType> enumHelper = new JacksonJsonEnumHelper<>(FileType.class, true);
+
+        @JsonCreator
+        public static FileType forValue(String value) {
+            return enumHelper.forValue(value);
+        }
+
+        @JsonValue
+        public String toValue() {
+            return (enumHelper.toString(this));
+        }
+
+        @Override
+        public String toString() {
+            return (enumHelper.toString(this));
+        }
+    }
+
+    private FileType fileType;
+    private Integer size;
+    private String filename;
+    private String fileFormat;
+
+    public FileType getFileType() {
+        return fileType;
+    }
+
+    public void setFileType(FileType fileType) {
+        this.fileType = fileType;
+    }
+
+    public Integer getSize() {
+        return size;
+    }
+
+    public void setSize(Integer size) {
+        this.size = size;
+    }
+
+    public String getFilename() {
+        return filename;
+    }
+
+    public void setFilename(String filename) {
+        this.filename = filename;
+    }
+
+    public String getFileFormat() {
+        return fileFormat;
+    }
+
+    public void setFileFormat(String fileFormat) {
+        this.fileFormat = fileFormat;
+    }
+}