Feature: added maven wrapper and docs.

.mvn/wrapper/maven-wrapper.properties

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.6/apache-maven-3.8.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contribute to a positive environment for our
+community include:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+- Focusing on what is best, not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+info@cardanofoundation.org.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

CONTRIBUTING.md

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+# Contributing to this project
+
+First off, thanks for taking the time to contribute! 🎉
+
+When contributing to this repository, please first describe the change you wish to make [via an issue](../../issues/new) before making a change. For every other form of discussion use the [discussions section](../../discussions) of this repo.
+Please note we have a [code of conduct](CODE_OF_CONDUCT.md), please follow it in all your interactions with the project.
+
+## Issues and pull requests
+
+### Bug reports
+
+[Submit an issue](../../issues/new) using the provided template for bug reports. If the template does not fit your purpose start with a blank issue.
+
+For bug reports, it's very important to fill in the information in the structure provided by the templates to help us analyzing the bug.
+
+### Feature requests and ideas
+
+[Submit an issue](../../issues/new) using the provided template for feature requests. If the template does not fit your purpose start with a blank issue but make sure the name starts with a "FEATURE" in square brackets.
+
+If you are starting with a very vague idea instead of a concrete feature request post it in the [discussions section](../../discussions) of the repository where we can refine the idea with you and create a structured feature request from it.
+
+### Creating a pull request
+
+Thank you for contributing your changes by opening a pull requests! To get something merged we usually require:
+
+- ❗ Description of the changes - please follow the [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/#specification) as we use it to automatically generate our CHANGELOG ❗
+- Quality of changes is ensured - through new or updated automated tests
+- Change is related to an issue (feature request or bug report) - ideally discussed beforehand
+- Well-scoped - we prefer multiple PRs, rather than a big one

SECURITY.md

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+# Security Policy
+
+## Reporting a Vulnerability
+
+This Java rewards calculation project takes security seriously. We appreciate your efforts in disclosing any potential vulnerabilities responsibly.
+If you have discovered a security vulnerability within this project, please report it to us as soon as possible. We encourage responsible disclosure and kindly ask you to follow the guidelines outlined below.
+
+## Guidelines for Responsible Disclosure
+
+To ensure that the security vulnerability is properly addressed, we request that you adhere to the following guidelines:
+
+1. **Do not exploit the vulnerability**: Do not attempt to exploit the vulnerability or gain unauthorized access to any user data. Only perform actions that are necessary to identify or validate the vulnerability.
+2. **Privately disclose the vulnerability**: Please do not disclose the vulnerability publicly before we have had an opportunity to investigate and address the issue. We appreciate your discretion.
+3. **Contact us directly**: Send an email to our team at info@cardanofoundation.org with the subject line: "[Java rewards calculation] Security Vulnerability Report"
+4. **Provide detailed information**: In your report, please include detailed information about the vulnerability, including steps to reproduce it and any potential impact.
+5. **Share your contact information**: We would appreciate it if you could provide your name and contact information, including your email address or other means of communication, so we can reach out to you if we require any additional information.
+6. **Keep communication confidential**: While we investigate and address the vulnerability, we kindly request that you keep all communication related to the vulnerability confidential.
+7. **Allow time for a response**: We strive to acknowledge vulnerability reports as soon as possible and will make every effort to respond within a reasonable timeframe. Please be patient while we investigate and address the reported issue.
+
+## Recognition and Acknowledgment
+
+We believe in recognizing the valuable contributions of the security community and are open to acknowledging those who responsibly disclose vulnerabilities. If you would like to be acknowledged for your responsible disclosure, please let us know when reporting the vulnerability. However, we respect your privacy and will not disclose any personal information without your explicit consent.
+Thank you for helping us ensure the security of the Java rewards calculation and the broader Cardano ecosystem. Your efforts are greatly appreciated.